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Finding the Fourth Proportional to 663,469.46, 993,641.86 and 438,271.34

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Solution

The fourth proportional to 663,469.46, 993,641.86 and 438,271.34 is: 656,374.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,469.46 : 993,641.86 = 438,271.34 : x
  2. Step 2: Convert to fraction form
    663,469.46/993,641.86 = 438,271.34/x
  3. Step 3: Cross multiply
    663,469.46x = 993,641.86 × 438,271.34
  4. Step 4: Simplify right side
    663,469.46x = 435,484,750,850.72
  5. Step 5: Solve for x
    x = 435,484,750,850.72/663,469.46
  6. Step 6: Final answer
    x = 656,374.97

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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.