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Finding the Fourth Proportional to 663,468.47, 993,640.36 and 438,270.34

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Solution

The fourth proportional to 663,468.47, 993,640.36 and 438,270.34 is: 656,373.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,468.47 : 993,640.36 = 438,270.34 : x
  2. Step 2: Convert to fraction form
    663,468.47/993,640.36 = 438,270.34/x
  3. Step 3: Cross multiply
    663,468.47x = 993,640.36 × 438,270.34
  4. Step 4: Simplify right side
    663,468.47x = 435,483,096,223.57
  5. Step 5: Solve for x
    x = 435,483,096,223.57/663,468.47
  6. Step 6: Final answer
    x = 656,373.47

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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.