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Finding the Fourth Proportional to 359,638.80, 539,458.20 and 122,989.20

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Solution

The fourth proportional to 359,638.80, 539,458.20 and 122,989.20 is: 184,483.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,638.80 : 539,458.20 = 122,989.20 : x
  2. Step 2: Convert to fraction form
    359,638.80/539,458.20 = 122,989.20/x
  3. Step 3: Cross multiply
    359,638.80x = 539,458.20 × 122,989.20
  4. Step 4: Simplify right side
    359,638.80x = 66,347,532,451.44
  5. Step 5: Solve for x
    x = 66,347,532,451.44/359,638.80
  6. Step 6: Final answer
    x = 184,483.80

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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.