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Finding the Fourth Proportional to 545,007.20, 817,656.60 and 387,543.20

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Solution

The fourth proportional to 545,007.20, 817,656.60 and 387,543.20 is: 581,418.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,007.20 : 817,656.60 = 387,543.20 : x
  2. Step 2: Convert to fraction form
    545,007.20/817,656.60 = 387,543.20/x
  3. Step 3: Cross multiply
    545,007.20x = 817,656.60 × 387,543.20
  4. Step 4: Simplify right side
    545,007.20x = 316,877,255,265.12
  5. Step 5: Solve for x
    x = 316,877,255,265.12/545,007.20
  6. Step 6: Final answer
    x = 581,418.48

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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.