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Finding the Fourth Proportional to 630.98, 868.89 and 561.32

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Solution

The fourth proportional to 630.98, 868.89 and 561.32 is: 772.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.98 : 868.89 = 561.32 : x
  2. Step 2: Convert to fraction form
    630.98/868.89 = 561.32/x
  3. Step 3: Cross multiply
    630.98x = 868.89 × 561.32
  4. Step 4: Simplify right side
    630.98x = 487,725.33
  5. Step 5: Solve for x
    x = 487,725.33/630.98
  6. Step 6: Final answer
    x = 772.96

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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.