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Finding the Fourth Proportional to 720,974.23, 994,950.89 and 398,706.01

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Solution

The fourth proportional to 720,974.23, 994,950.89 and 398,706.01 is: 550,217.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,974.23 : 994,950.89 = 398,706.01 : x
  2. Step 2: Convert to fraction form
    720,974.23/994,950.89 = 398,706.01/x
  3. Step 3: Cross multiply
    720,974.23x = 994,950.89 × 398,706.01
  4. Step 4: Simplify right side
    720,974.23x = 396,692,899,497.85
  5. Step 5: Solve for x
    x = 396,692,899,497.85/720,974.23
  6. Step 6: Final answer
    x = 550,217.86

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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.