Home / 720,981.73-994,961.28-398,713.51

Finding the Fourth Proportional to 720,981.73, 994,961.28 and 398,713.51

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Solution

The fourth proportional to 720,981.73, 994,961.28 and 398,713.51 is: 550,228.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,981.73 : 994,961.28 = 398,713.51 : x
  2. Step 2: Convert to fraction form
    720,981.73/994,961.28 = 398,713.51/x
  3. Step 3: Cross multiply
    720,981.73x = 994,961.28 × 398,713.51
  4. Step 4: Simplify right side
    720,981.73x = 396,704,504,262.89
  5. Step 5: Solve for x
    x = 396,704,504,262.89/720,981.73
  6. Step 6: Final answer
    x = 550,228.23

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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.