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Finding the Fourth Proportional to 652,115.40, 978,345.90 and 231,347.40

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Solution

The fourth proportional to 652,115.40, 978,345.90 and 231,347.40 is: 347,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,115.40 : 978,345.90 = 231,347.40 : x
  2. Step 2: Convert to fraction form
    652,115.40/978,345.90 = 231,347.40/x
  3. Step 3: Cross multiply
    652,115.40x = 978,345.90 × 231,347.40
  4. Step 4: Simplify right side
    652,115.40x = 226,337,780,265.66
  5. Step 5: Solve for x
    x = 226,337,780,265.66/652,115.40
  6. Step 6: Final answer
    x = 347,082.40

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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.