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Finding the Fourth Proportional to 720,642.54, 994,469.04 and 398,344.26

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Solution

The fourth proportional to 720,642.54, 994,469.04 and 398,344.26 is: 549,705.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,642.54 : 994,469.04 = 398,344.26 : x
  2. Step 2: Convert to fraction form
    720,642.54/994,469.04 = 398,344.26/x
  3. Step 3: Cross multiply
    720,642.54x = 994,469.04 × 398,344.26
  4. Step 4: Simplify right side
    720,642.54x = 396,141,033,831.71
  5. Step 5: Solve for x
    x = 396,141,033,831.71/720,642.54
  6. Step 6: Final answer
    x = 549,705.31

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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.