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Finding the Fourth Proportional to 391,159.20, 586,969.20 and 141,808.80

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Solution

The fourth proportional to 391,159.20, 586,969.20 and 141,808.80 is: 212,796.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,159.20 : 586,969.20 = 141,808.80 : x
  2. Step 2: Convert to fraction form
    391,159.20/586,969.20 = 141,808.80/x
  3. Step 3: Cross multiply
    391,159.20x = 586,969.20 × 141,808.80
  4. Step 4: Simplify right side
    391,159.20x = 83,237,397,888.96
  5. Step 5: Solve for x
    x = 83,237,397,888.96/391,159.20
  6. Step 6: Final answer
    x = 212,796.73

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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.