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Finding the Fourth Proportional to 481,374.72, 664,354.80 and 280,170.72

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Solution

The fourth proportional to 481,374.72, 664,354.80 and 280,170.72 is: 386,669.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,374.72 : 664,354.80 = 280,170.72 : x
  2. Step 2: Convert to fraction form
    481,374.72/664,354.80 = 280,170.72/x
  3. Step 3: Cross multiply
    481,374.72x = 664,354.80 × 280,170.72
  4. Step 4: Simplify right side
    481,374.72x = 186,132,762,651.46
  5. Step 5: Solve for x
    x = 186,132,762,651.46/481,374.72
  6. Step 6: Final answer
    x = 386,669.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.