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Finding the Fourth Proportional to 319,349.39, 479,013.75 and 129,753.77

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Solution

The fourth proportional to 319,349.39, 479,013.75 and 129,753.77 is: 194,626.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,349.39 : 479,013.75 = 129,753.77 : x
  2. Step 2: Convert to fraction form
    319,349.39/479,013.75 = 129,753.77/x
  3. Step 3: Cross multiply
    319,349.39x = 479,013.75 × 129,753.77
  4. Step 4: Simplify right side
    319,349.39x = 62,153,837,549.27
  5. Step 5: Solve for x
    x = 62,153,837,549.27/319,349.39
  6. Step 6: Final answer
    x = 194,626.45

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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.