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Finding the Fourth Proportional to 359,619, 539,454.42 and 138,003

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Solution

The fourth proportional to 359,619, 539,454.42 and 138,003 is: 207,014.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,619 : 539,454.42 = 138,003 : x
  2. Step 2: Convert to fraction form
    359,619/539,454.42 = 138,003/x
  3. Step 3: Cross multiply
    359,619x = 539,454.42 × 138,003
  4. Step 4: Simplify right side
    359,619x = 74,446,328,323.26
  5. Step 5: Solve for x
    x = 74,446,328,323.26/359,619
  6. Step 6: Final answer
    x = 207,014.45

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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.