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Finding the Fourth Proportional to 399,589.65, 551,444.54 and 238,538.17

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Solution

The fourth proportional to 399,589.65, 551,444.54 and 238,538.17 is: 329,189.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,589.65 : 551,444.54 = 238,538.17 : x
  2. Step 2: Convert to fraction form
    399,589.65/551,444.54 = 238,538.17/x
  3. Step 3: Cross multiply
    399,589.65x = 551,444.54 × 238,538.17
  4. Step 4: Simplify right side
    399,589.65x = 131,540,571,428.09
  5. Step 5: Solve for x
    x = 131,540,571,428.09/399,589.65
  6. Step 6: Final answer
    x = 329,189.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.