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Finding the Fourth Proportional to 667,445.36, 921,066.96 and 361,515.92

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Solution

The fourth proportional to 667,445.36, 921,066.96 and 361,515.92 is: 498,887.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,445.36 : 921,066.96 = 361,515.92 : x
  2. Step 2: Convert to fraction form
    667,445.36/921,066.96 = 361,515.92/x
  3. Step 3: Cross multiply
    667,445.36x = 921,066.96 × 361,515.92
  4. Step 4: Simplify right side
    667,445.36x = 332,980,369,426.00
  5. Step 5: Solve for x
    x = 332,980,369,426.00/667,445.36
  6. Step 6: Final answer
    x = 498,887.83

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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.