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Finding the Fourth Proportional to 720,972.48, 994,948.47 and 398,704.26

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Solution

The fourth proportional to 720,972.48, 994,948.47 and 398,704.26 is: 550,215.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,972.48 : 994,948.47 = 398,704.26 : x
  2. Step 2: Convert to fraction form
    720,972.48/994,948.47 = 398,704.26/x
  3. Step 3: Cross multiply
    720,972.48x = 994,948.47 × 398,704.26
  4. Step 4: Simplify right side
    720,972.48x = 396,690,193,469.48
  5. Step 5: Solve for x
    x = 396,690,193,469.48/720,972.48
  6. Step 6: Final answer
    x = 550,215.44

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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.