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Finding the Fourth Proportional to 279,719.90, 418,595.70 and 256,100.30

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Solution

The fourth proportional to 279,719.90, 418,595.70 and 256,100.30 is: 383,249.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,719.90 : 418,595.70 = 256,100.30 : x
  2. Step 2: Convert to fraction form
    279,719.90/418,595.70 = 256,100.30/x
  3. Step 3: Cross multiply
    279,719.90x = 418,595.70 × 256,100.30
  4. Step 4: Simplify right side
    279,719.90x = 107,202,484,348.71
  5. Step 5: Solve for x
    x = 107,202,484,348.71/279,719.90
  6. Step 6: Final answer
    x = 383,249.40

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1.5x scale

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.