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Finding the Fourth Proportional to 279,142.80, 418,714.20 and 251,149.20

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Solution

The fourth proportional to 279,142.80, 418,714.20 and 251,149.20 is: 376,723.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,142.80 : 418,714.20 = 251,149.20 : x
  2. Step 2: Convert to fraction form
    279,142.80/418,714.20 = 251,149.20/x
  3. Step 3: Cross multiply
    279,142.80x = 418,714.20 × 251,149.20
  4. Step 4: Simplify right side
    279,142.80x = 105,159,736,358.64
  5. Step 5: Solve for x
    x = 105,159,736,358.64/279,142.80
  6. Step 6: Final answer
    x = 376,723.80

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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.