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Finding the Fourth Proportional to 660,139.32, 993,791.64 and 591,555

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Solution

The fourth proportional to 660,139.32, 993,791.64 and 591,555 is: 890,542.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,139.32 : 993,791.64 = 591,555 : x
  2. Step 2: Convert to fraction form
    660,139.32/993,791.64 = 591,555/x
  3. Step 3: Cross multiply
    660,139.32x = 993,791.64 × 591,555
  4. Step 4: Simplify right side
    660,139.32x = 587,882,413,600.20
  5. Step 5: Solve for x
    x = 587,882,413,600.20/660,139.32
  6. Step 6: Final answer
    x = 890,542.94

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.