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Finding the Fourth Proportional to 657,638.70, 986,458.05 and 445,062.30

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Solution

The fourth proportional to 657,638.70, 986,458.05 and 445,062.30 is: 667,593.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,638.70 : 986,458.05 = 445,062.30 : x
  2. Step 2: Convert to fraction form
    657,638.70/986,458.05 = 445,062.30/x
  3. Step 3: Cross multiply
    657,638.70x = 986,458.05 × 445,062.30
  4. Step 4: Simplify right side
    657,638.70x = 439,035,288,586.52
  5. Step 5: Solve for x
    x = 439,035,288,586.52/657,638.70
  6. Step 6: Final answer
    x = 667,593.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.