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Finding the Fourth Proportional to 321,958.80, 482,743.80 and 144,432.72

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Solution

The fourth proportional to 321,958.80, 482,743.80 and 144,432.72 is: 216,561.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,958.80 : 482,743.80 = 144,432.72 : x
  2. Step 2: Convert to fraction form
    321,958.80/482,743.80 = 144,432.72/x
  3. Step 3: Cross multiply
    321,958.80x = 482,743.80 × 144,432.72
  4. Step 4: Simplify right side
    321,958.80x = 69,724,000,097.14
  5. Step 5: Solve for x
    x = 69,724,000,097.14/321,958.80
  6. Step 6: Final answer
    x = 216,561.87

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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.