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Finding the Fourth Proportional to 631.76, 877.86 and 625.01

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Solution

The fourth proportional to 631.76, 877.86 and 625.01 is: 868.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.76 : 877.86 = 625.01 : x
  2. Step 2: Convert to fraction form
    631.76/877.86 = 625.01/x
  3. Step 3: Cross multiply
    631.76x = 877.86 × 625.01
  4. Step 4: Simplify right side
    631.76x = 548,671.28
  5. Step 5: Solve for x
    x = 548,671.28/631.76
  6. Step 6: Final answer
    x = 868.48

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.