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Finding the Fourth Proportional to 663,469.71, 993,642.23 and 438,271.59

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Solution

The fourth proportional to 663,469.71, 993,642.23 and 438,271.59 is: 656,375.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,469.71 : 993,642.23 = 438,271.59 : x
  2. Step 2: Convert to fraction form
    663,469.71/993,642.23 = 438,271.59/x
  3. Step 3: Cross multiply
    663,469.71x = 993,642.23 × 438,271.59
  4. Step 4: Simplify right side
    663,469.71x = 435,485,160,033.25
  5. Step 5: Solve for x
    x = 435,485,160,033.25/663,469.71
  6. Step 6: Final answer
    x = 656,375.35

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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.