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Finding the Fourth Proportional to 701,422.16, 967,960.68 and 399,618.32

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Solution

The fourth proportional to 701,422.16, 967,960.68 and 399,618.32 is: 551,472.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    701,422.16 : 967,960.68 = 399,618.32 : x
  2. Step 2: Convert to fraction form
    701,422.16/967,960.68 = 399,618.32/x
  3. Step 3: Cross multiply
    701,422.16x = 967,960.68 × 399,618.32
  4. Step 4: Simplify right side
    701,422.16x = 386,814,820,767.66
  5. Step 5: Solve for x
    x = 386,814,820,767.66/701,422.16
  6. Step 6: Final answer
    x = 551,472.20

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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.