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Finding the Fourth Proportional to 720,617.90, 994,452.92 and 393,932.34

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Solution

The fourth proportional to 720,617.90, 994,452.92 and 393,932.34 is: 543,626.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,617.90 : 994,452.92 = 393,932.34 : x
  2. Step 2: Convert to fraction form
    720,617.90/994,452.92 = 393,932.34/x
  3. Step 3: Cross multiply
    720,617.90x = 994,452.92 × 393,932.34
  4. Step 4: Simplify right side
    720,617.90x = 391,747,171,153.49
  5. Step 5: Solve for x
    x = 391,747,171,153.49/720,617.90
  6. Step 6: Final answer
    x = 543,626.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.