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Finding the Fourth Proportional to 667,237.20, 920,789.19 and 361,317.18

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Solution

The fourth proportional to 667,237.20, 920,789.19 and 361,317.18 is: 498,618.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,237.20 : 920,789.19 = 361,317.18 : x
  2. Step 2: Convert to fraction form
    667,237.20/920,789.19 = 361,317.18/x
  3. Step 3: Cross multiply
    667,237.20x = 920,789.19 × 361,317.18
  4. Step 4: Simplify right side
    667,237.20x = 332,696,953,505.28
  5. Step 5: Solve for x
    x = 332,696,953,505.28/667,237.20
  6. Step 6: Final answer
    x = 498,618.71

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1.5x scale

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.