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Finding the Fourth Proportional to 720,393.17, 994,057.88 and 398,084.04

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Solution

The fourth proportional to 720,393.17, 994,057.88 and 398,084.04 is: 549,309.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,393.17 : 994,057.88 = 398,084.04 : x
  2. Step 2: Convert to fraction form
    720,393.17/994,057.88 = 398,084.04/x
  3. Step 3: Cross multiply
    720,393.17x = 994,057.88 × 398,084.04
  4. Step 4: Simplify right side
    720,393.17x = 395,718,574,873.82
  5. Step 5: Solve for x
    x = 395,718,574,873.82/720,393.17
  6. Step 6: Final answer
    x = 549,309.17

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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.