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Finding the Fourth Proportional to 312,685.96, 431,508.18 and 183,711.28

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Solution

The fourth proportional to 312,685.96, 431,508.18 and 183,711.28 is: 253,522.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,685.96 : 431,508.18 = 183,711.28 : x
  2. Step 2: Convert to fraction form
    312,685.96/431,508.18 = 183,711.28/x
  3. Step 3: Cross multiply
    312,685.96x = 431,508.18 × 183,711.28
  4. Step 4: Simplify right side
    312,685.96x = 79,272,920,078.27
  5. Step 5: Solve for x
    x = 79,272,920,078.27/312,685.96
  6. Step 6: Final answer
    x = 253,522.48

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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.