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Finding the Fourth Proportional to 486,093.40, 729,140.10 and 478,220.20

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Solution

The fourth proportional to 486,093.40, 729,140.10 and 478,220.20 is: 717,330.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,093.40 : 729,140.10 = 478,220.20 : x
  2. Step 2: Convert to fraction form
    486,093.40/729,140.10 = 478,220.20/x
  3. Step 3: Cross multiply
    486,093.40x = 729,140.10 × 478,220.20
  4. Step 4: Simplify right side
    486,093.40x = 348,689,524,450.02
  5. Step 5: Solve for x
    x = 348,689,524,450.02/486,093.40
  6. Step 6: Final answer
    x = 717,330.30

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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.