Home / 720,968.92-994,943.60-398,700.88

Finding the Fourth Proportional to 720,968.92, 994,943.60 and 398,700.88

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Solution

The fourth proportional to 720,968.92, 994,943.60 and 398,700.88 is: 550,210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,968.92 : 994,943.60 = 398,700.88 : x
  2. Step 2: Convert to fraction form
    720,968.92/994,943.60 = 398,700.88/x
  3. Step 3: Cross multiply
    720,968.92x = 994,943.60 × 398,700.88
  4. Step 4: Simplify right side
    720,968.92x = 396,684,888,870.37
  5. Step 5: Solve for x
    x = 396,684,888,870.37/720,968.92
  6. Step 6: Final answer
    x = 550,210.80

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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.