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Finding the Fourth Proportional to 398,430.20, 597,645.30 and 149,079.80

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Solution

The fourth proportional to 398,430.20, 597,645.30 and 149,079.80 is: 223,619.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,430.20 : 597,645.30 = 149,079.80 : x
  2. Step 2: Convert to fraction form
    398,430.20/597,645.30 = 149,079.80/x
  3. Step 3: Cross multiply
    398,430.20x = 597,645.30 × 149,079.80
  4. Step 4: Simplify right side
    398,430.20x = 89,096,841,794.94
  5. Step 5: Solve for x
    x = 89,096,841,794.94/398,430.20
  6. Step 6: Final answer
    x = 223,619.70

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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.