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Finding the Fourth Proportional to 398,819.80, 598,229.70 and 162,332.20

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Solution

The fourth proportional to 398,819.80, 598,229.70 and 162,332.20 is: 243,498.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,819.80 : 598,229.70 = 162,332.20 : x
  2. Step 2: Convert to fraction form
    398,819.80/598,229.70 = 162,332.20/x
  3. Step 3: Cross multiply
    398,819.80x = 598,229.70 × 162,332.20
  4. Step 4: Simplify right side
    398,819.80x = 97,111,943,306.34
  5. Step 5: Solve for x
    x = 97,111,943,306.34/398,819.80
  6. Step 6: Final answer
    x = 243,498.30

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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.