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Finding the Fourth Proportional to 256,565.88, 384,885 and 79,087.32

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Solution

The fourth proportional to 256,565.88, 384,885 and 79,087.32 is: 118,642.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,565.88 : 384,885 = 79,087.32 : x
  2. Step 2: Convert to fraction form
    256,565.88/384,885 = 79,087.32/x
  3. Step 3: Cross multiply
    256,565.88x = 384,885 × 79,087.32
  4. Step 4: Simplify right side
    256,565.88x = 30,439,523,158.20
  5. Step 5: Solve for x
    x = 30,439,523,158.20/256,565.88
  6. Step 6: Final answer
    x = 118,642.13

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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.