Home / 818,887,072.80-1,228,330,609.20-409,890,079.20

Finding the Fourth Proportional to 818,887,072.80, 1,228,330,609.20 and 409,890,079.20

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Solution

The fourth proportional to 818,887,072.80, 1,228,330,609.20 and 409,890,079.20 is: 614,835,118.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,887,072.80 : 1,228,330,609.20 = 409,890,079.20 : x
  2. Step 2: Convert to fraction form
    818,887,072.80/1,228,330,609.20 = 409,890,079.20/x
  3. Step 3: Cross multiply
    818,887,072.80x = 1,228,330,609.20 × 409,890,079.20
  4. Step 4: Simplify right side
    818,887,072.80x = 503,480,530,688,772,224
  5. Step 5: Solve for x
    x = 503,480,530,688,772,224/818,887,072.80
  6. Step 6: Final answer
    x = 614,835,118.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.