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Finding the Fourth Proportional to 397,372.80, 595,281.60 and 239,131.20

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Solution

The fourth proportional to 397,372.80, 595,281.60 and 239,131.20 is: 358,228.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,372.80 : 595,281.60 = 239,131.20 : x
  2. Step 2: Convert to fraction form
    397,372.80/595,281.60 = 239,131.20/x
  3. Step 3: Cross multiply
    397,372.80x = 595,281.60 × 239,131.20
  4. Step 4: Simplify right side
    397,372.80x = 142,350,403,345.92
  5. Step 5: Solve for x
    x = 142,350,403,345.92/397,372.80
  6. Step 6: Final answer
    x = 358,228.86

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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.