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Finding the Fourth Proportional to 356,255.91, 534,418.95 and 103,538.60

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Solution

The fourth proportional to 356,255.91, 534,418.95 and 103,538.60 is: 155,318.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,255.91 : 534,418.95 = 103,538.60 : x
  2. Step 2: Convert to fraction form
    356,255.91/534,418.95 = 103,538.60/x
  3. Step 3: Cross multiply
    356,255.91x = 534,418.95 × 103,538.60
  4. Step 4: Simplify right side
    356,255.91x = 55,332,992,040.42
  5. Step 5: Solve for x
    x = 55,332,992,040.42/356,255.91
  6. Step 6: Final answer
    x = 155,318.10

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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.