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Finding the Fourth Proportional to 279,228.86, 418,704.91 and 99,287.30

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Solution

The fourth proportional to 279,228.86, 418,704.91 and 99,287.30 is: 148,881.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,228.86 : 418,704.91 = 99,287.30 : x
  2. Step 2: Convert to fraction form
    279,228.86/418,704.91 = 99,287.30/x
  3. Step 3: Cross multiply
    279,228.86x = 418,704.91 × 99,287.30
  4. Step 4: Simplify right side
    279,228.86x = 41,572,080,010.64
  5. Step 5: Solve for x
    x = 41,572,080,010.64/279,228.86
  6. Step 6: Final answer
    x = 148,881.75

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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.