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Finding the Fourth Proportional to 499,487.80, 749,328.90 and 144,513.40

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Solution

The fourth proportional to 499,487.80, 749,328.90 and 144,513.40 is: 216,798.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,487.80 : 749,328.90 = 144,513.40 : x
  2. Step 2: Convert to fraction form
    499,487.80/749,328.90 = 144,513.40/x
  3. Step 3: Cross multiply
    499,487.80x = 749,328.90 × 144,513.40
  4. Step 4: Simplify right side
    499,487.80x = 108,288,067,057.26
  5. Step 5: Solve for x
    x = 108,288,067,057.26/499,487.80
  6. Step 6: Final answer
    x = 216,798.22

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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.