Home / 810,200.60-1,215,300.90-509,706.80

Finding the Fourth Proportional to 810,200.60, 1,215,300.90 and 509,706.80

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Solution

The fourth proportional to 810,200.60, 1,215,300.90 and 509,706.80 is: 764,560.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,200.60 : 1,215,300.90 = 509,706.80 : x
  2. Step 2: Convert to fraction form
    810,200.60/1,215,300.90 = 509,706.80/x
  3. Step 3: Cross multiply
    810,200.60x = 1,215,300.90 × 509,706.80
  4. Step 4: Simplify right side
    810,200.60x = 619,447,132,776.12
  5. Step 5: Solve for x
    x = 619,447,132,776.12/810,200.60
  6. Step 6: Final answer
    x = 764,560.20

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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.