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Finding the Fourth Proportional to 652,287.10, 978,430.65 and 413,138.65

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Solution

The fourth proportional to 652,287.10, 978,430.65 and 413,138.65 is: 619,707.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,287.10 : 978,430.65 = 413,138.65 : x
  2. Step 2: Convert to fraction form
    652,287.10/978,430.65 = 413,138.65/x
  3. Step 3: Cross multiply
    652,287.10x = 978,430.65 × 413,138.65
  4. Step 4: Simplify right side
    652,287.10x = 404,227,517,859.62
  5. Step 5: Solve for x
    x = 404,227,517,859.62/652,287.10
  6. Step 6: Final answer
    x = 619,707.98

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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.