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Finding the Fourth Proportional to 256,925.32, 385,398.06 and 79,416.52

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Solution

The fourth proportional to 256,925.32, 385,398.06 and 79,416.52 is: 119,127.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,925.32 : 385,398.06 = 79,416.52 : x
  2. Step 2: Convert to fraction form
    256,925.32/385,398.06 = 79,416.52/x
  3. Step 3: Cross multiply
    256,925.32x = 385,398.06 × 79,416.52
  4. Step 4: Simplify right side
    256,925.32x = 30,606,972,739.95
  5. Step 5: Solve for x
    x = 30,606,972,739.95/256,925.32
  6. Step 6: Final answer
    x = 119,127.90

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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.