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Finding the Fourth Proportional to 667,079.78, 920,570.28 and 361,156.10

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Solution

The fourth proportional to 667,079.78, 920,570.28 and 361,156.10 is: 498,395.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,079.78 : 920,570.28 = 361,156.10 : x
  2. Step 2: Convert to fraction form
    667,079.78/920,570.28 = 361,156.10/x
  3. Step 3: Cross multiply
    667,079.78x = 920,570.28 × 361,156.10
  4. Step 4: Simplify right side
    667,079.78x = 332,469,572,100.71
  5. Step 5: Solve for x
    x = 332,469,572,100.71/667,079.78
  6. Step 6: Final answer
    x = 498,395.52

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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.