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Finding the Fourth Proportional to 355,129.20, 532,693.80 and 144,658.80

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Solution

The fourth proportional to 355,129.20, 532,693.80 and 144,658.80 is: 216,988.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,129.20 : 532,693.80 = 144,658.80 : x
  2. Step 2: Convert to fraction form
    355,129.20/532,693.80 = 144,658.80/x
  3. Step 3: Cross multiply
    355,129.20x = 532,693.80 × 144,658.80
  4. Step 4: Simplify right side
    355,129.20x = 77,058,845,875.44
  5. Step 5: Solve for x
    x = 77,058,845,875.44/355,129.20
  6. Step 6: Final answer
    x = 216,988.20

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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.