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Finding the Fourth Proportional to 359,641.80, 539,462.70 and 122,992.20

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Solution

The fourth proportional to 359,641.80, 539,462.70 and 122,992.20 is: 184,488.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,641.80 : 539,462.70 = 122,992.20 : x
  2. Step 2: Convert to fraction form
    359,641.80/539,462.70 = 122,992.20/x
  3. Step 3: Cross multiply
    359,641.80x = 539,462.70 × 122,992.20
  4. Step 4: Simplify right side
    359,641.80x = 66,349,704,290.94
  5. Step 5: Solve for x
    x = 66,349,704,290.94/359,641.80
  6. Step 6: Final answer
    x = 184,488.30

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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.