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Finding the Fourth Proportional to 722,718.40, 998,191.20 and 680,728

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Solution

The fourth proportional to 722,718.40, 998,191.20 and 680,728 is: 940,195.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,718.40 : 998,191.20 = 680,728 : x
  2. Step 2: Convert to fraction form
    722,718.40/998,191.20 = 680,728/x
  3. Step 3: Cross multiply
    722,718.40x = 998,191.20 × 680,728
  4. Step 4: Simplify right side
    722,718.40x = 679,496,699,193.60
  5. Step 5: Solve for x
    x = 679,496,699,193.60/722,718.40
  6. Step 6: Final answer
    x = 940,195.65

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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.