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Finding the Fourth Proportional to 667,644.24, 921,434.76 and 381,098.64

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Solution

The fourth proportional to 667,644.24, 921,434.76 and 381,098.64 is: 525,965.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,644.24 : 921,434.76 = 381,098.64 : x
  2. Step 2: Convert to fraction form
    667,644.24/921,434.76 = 381,098.64/x
  3. Step 3: Cross multiply
    667,644.24x = 921,434.76 × 381,098.64
  4. Step 4: Simplify right side
    667,644.24x = 351,157,533,884.73
  5. Step 5: Solve for x
    x = 351,157,533,884.73/667,644.24
  6. Step 6: Final answer
    x = 525,965.05

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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.