Home / 809,256.80-1,213,885.20-210,168.80

Finding the Fourth Proportional to 809,256.80, 1,213,885.20 and 210,168.80

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Solution

The fourth proportional to 809,256.80, 1,213,885.20 and 210,168.80 is: 315,253.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,256.80 : 1,213,885.20 = 210,168.80 : x
  2. Step 2: Convert to fraction form
    809,256.80/1,213,885.20 = 210,168.80/x
  3. Step 3: Cross multiply
    809,256.80x = 1,213,885.20 × 210,168.80
  4. Step 4: Simplify right side
    809,256.80x = 255,120,795,821.76
  5. Step 5: Solve for x
    x = 255,120,795,821.76/809,256.80
  6. Step 6: Final answer
    x = 315,253.20

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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.