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Finding the Fourth Proportional to 486,092.40, 729,138.60 and 478,219.20

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Solution

The fourth proportional to 486,092.40, 729,138.60 and 478,219.20 is: 717,328.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,092.40 : 729,138.60 = 478,219.20 : x
  2. Step 2: Convert to fraction form
    486,092.40/729,138.60 = 478,219.20/x
  3. Step 3: Cross multiply
    486,092.40x = 729,138.60 × 478,219.20
  4. Step 4: Simplify right side
    486,092.40x = 348,688,077,981.12
  5. Step 5: Solve for x
    x = 348,688,077,981.12/486,092.40
  6. Step 6: Final answer
    x = 717,328.80

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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.