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Finding the Fourth Proportional to 545,006.20, 817,655.10 and 387,542.20

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Solution

The fourth proportional to 545,006.20, 817,655.10 and 387,542.20 is: 581,416.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,006.20 : 817,655.10 = 387,542.20 : x
  2. Step 2: Convert to fraction form
    545,006.20/817,655.10 = 387,542.20/x
  3. Step 3: Cross multiply
    545,006.20x = 817,655.10 × 387,542.20
  4. Step 4: Simplify right side
    545,006.20x = 316,875,856,295.22
  5. Step 5: Solve for x
    x = 316,875,856,295.22/545,006.20
  6. Step 6: Final answer
    x = 581,416.98

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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.