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Finding the Fourth Proportional to 279,721.90, 418,598.70 and 256,102.30

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Solution

The fourth proportional to 279,721.90, 418,598.70 and 256,102.30 is: 383,252.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,721.90 : 418,598.70 = 256,102.30 : x
  2. Step 2: Convert to fraction form
    279,721.90/418,598.70 = 256,102.30/x
  3. Step 3: Cross multiply
    279,721.90x = 418,598.70 × 256,102.30
  4. Step 4: Simplify right side
    279,721.90x = 107,204,089,847.01
  5. Step 5: Solve for x
    x = 107,204,089,847.01/279,721.90
  6. Step 6: Final answer
    x = 383,252.40

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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.