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Finding the Fourth Proportional to 667,060.57, 920,536.95 and 361,128.88

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Solution

The fourth proportional to 667,060.57, 920,536.95 and 361,128.88 is: 498,354.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,060.57 : 920,536.95 = 361,128.88 : x
  2. Step 2: Convert to fraction form
    667,060.57/920,536.95 = 361,128.88/x
  3. Step 3: Cross multiply
    667,060.57x = 920,536.95 × 361,128.88
  4. Step 4: Simplify right side
    667,060.57x = 332,432,477,752.12
  5. Step 5: Solve for x
    x = 332,432,477,752.12/667,060.57
  6. Step 6: Final answer
    x = 498,354.26

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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.