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Finding the Fourth Proportional to 577,142.40, 865,713.60 and 478,838.40

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Solution

The fourth proportional to 577,142.40, 865,713.60 and 478,838.40 is: 718,257.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,142.40 : 865,713.60 = 478,838.40 : x
  2. Step 2: Convert to fraction form
    577,142.40/865,713.60 = 478,838.40/x
  3. Step 3: Cross multiply
    577,142.40x = 865,713.60 × 478,838.40
  4. Step 4: Simplify right side
    577,142.40x = 414,536,915,082.24
  5. Step 5: Solve for x
    x = 414,536,915,082.24/577,142.40
  6. Step 6: Final answer
    x = 718,257.60

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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.