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Finding the Fourth Proportional to 438,610.40, 658,069.20 and 189,471.20

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Solution

The fourth proportional to 438,610.40, 658,069.20 and 189,471.20 is: 284,273.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,610.40 : 658,069.20 = 189,471.20 : x
  2. Step 2: Convert to fraction form
    438,610.40/658,069.20 = 189,471.20/x
  3. Step 3: Cross multiply
    438,610.40x = 658,069.20 × 189,471.20
  4. Step 4: Simplify right side
    438,610.40x = 124,685,161,007.04
  5. Step 5: Solve for x
    x = 124,685,161,007.04/438,610.40
  6. Step 6: Final answer
    x = 284,273.15

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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.