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Finding the Fourth Proportional to 359,645.28, 539,537.28 and 138,012

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Solution

The fourth proportional to 359,645.28, 539,537.28 and 138,012 is: 207,044.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,645.28 : 539,537.28 = 138,012 : x
  2. Step 2: Convert to fraction form
    359,645.28/539,537.28 = 138,012/x
  3. Step 3: Cross multiply
    359,645.28x = 539,537.28 × 138,012
  4. Step 4: Simplify right side
    359,645.28x = 74,462,619,087.36
  5. Step 5: Solve for x
    x = 74,462,619,087.36/359,645.28
  6. Step 6: Final answer
    x = 207,044.62

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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.