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Finding the Fourth Proportional to 485,390.59, 727,514.02 and 218,839.03

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Solution

The fourth proportional to 485,390.59, 727,514.02 and 218,839.03 is: 328,000.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,390.59 : 727,514.02 = 218,839.03 : x
  2. Step 2: Convert to fraction form
    485,390.59/727,514.02 = 218,839.03/x
  3. Step 3: Cross multiply
    485,390.59x = 727,514.02 × 218,839.03
  4. Step 4: Simplify right side
    485,390.59x = 159,208,462,448.20
  5. Step 5: Solve for x
    x = 159,208,462,448.20/485,390.59
  6. Step 6: Final answer
    x = 328,000.72

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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.