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Finding the Fourth Proportional to 667,402.07, 921,010.12 and 361,471.40

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Solution

The fourth proportional to 667,402.07, 921,010.12 and 361,471.40 is: 498,827.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,402.07 : 921,010.12 = 361,471.40 : x
  2. Step 2: Convert to fraction form
    667,402.07/921,010.12 = 361,471.40/x
  3. Step 3: Cross multiply
    667,402.07x = 921,010.12 × 361,471.40
  4. Step 4: Simplify right side
    667,402.07x = 332,918,817,490.57
  5. Step 5: Solve for x
    x = 332,918,817,490.57/667,402.07
  6. Step 6: Final answer
    x = 498,827.97

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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.