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Finding the Fourth Proportional to 279,718.40, 418,593.45 and 256,098.80

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Solution

The fourth proportional to 279,718.40, 418,593.45 and 256,098.80 is: 383,247.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,718.40 : 418,593.45 = 256,098.80 : x
  2. Step 2: Convert to fraction form
    279,718.40/418,593.45 = 256,098.80/x
  3. Step 3: Cross multiply
    279,718.40x = 418,593.45 × 256,098.80
  4. Step 4: Simplify right side
    279,718.40x = 107,201,280,232.86
  5. Step 5: Solve for x
    x = 107,201,280,232.86/279,718.40
  6. Step 6: Final answer
    x = 383,247.15

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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.