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Finding the Fourth Proportional to 347,658.40, 521,276.40 and 137,053.60

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Solution

The fourth proportional to 347,658.40, 521,276.40 and 137,053.60 is: 205,497.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,658.40 : 521,276.40 = 137,053.60 : x
  2. Step 2: Convert to fraction form
    347,658.40/521,276.40 = 137,053.60/x
  3. Step 3: Cross multiply
    347,658.40x = 521,276.40 × 137,053.60
  4. Step 4: Simplify right side
    347,658.40x = 71,442,807,215.04
  5. Step 5: Solve for x
    x = 71,442,807,215.04/347,658.40
  6. Step 6: Final answer
    x = 205,497.14

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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.