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Finding the Fourth Proportional to 339,034.01, 508,542.81 and 86,315.04

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Solution

The fourth proportional to 339,034.01, 508,542.81 and 86,315.04 is: 129,470.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,034.01 : 508,542.81 = 86,315.04 : x
  2. Step 2: Convert to fraction form
    339,034.01/508,542.81 = 86,315.04/x
  3. Step 3: Cross multiply
    339,034.01x = 508,542.81 × 86,315.04
  4. Step 4: Simplify right side
    339,034.01x = 43,894,894,093.46
  5. Step 5: Solve for x
    x = 43,894,894,093.46/339,034.01
  6. Step 6: Final answer
    x = 129,470.48

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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.