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Finding the Fourth Proportional to 279,736.90, 418,621.20 and 256,117.30

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Solution

The fourth proportional to 279,736.90, 418,621.20 and 256,117.30 is: 383,274.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,736.90 : 418,621.20 = 256,117.30 : x
  2. Step 2: Convert to fraction form
    279,736.90/418,621.20 = 256,117.30/x
  3. Step 3: Cross multiply
    279,736.90x = 418,621.20 × 256,117.30
  4. Step 4: Simplify right side
    279,736.90x = 107,216,131,466.76
  5. Step 5: Solve for x
    x = 107,216,131,466.76/279,736.90
  6. Step 6: Final answer
    x = 383,274.90

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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.