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Finding the Fourth Proportional to 279,402.39, 385,649.46 and 172,062.42

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Solution

The fourth proportional to 279,402.39, 385,649.46 and 172,062.42 is: 237,491.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,402.39 : 385,649.46 = 172,062.42 : x
  2. Step 2: Convert to fraction form
    279,402.39/385,649.46 = 172,062.42/x
  3. Step 3: Cross multiply
    279,402.39x = 385,649.46 × 172,062.42
  4. Step 4: Simplify right side
    279,402.39x = 66,355,779,359.29
  5. Step 5: Solve for x
    x = 66,355,779,359.29/279,402.39
  6. Step 6: Final answer
    x = 237,491.81

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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.