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Finding the Fourth Proportional to 631.54, 868.01 and 557.41

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Solution

The fourth proportional to 631.54, 868.01 and 557.41 is: 766.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.54 : 868.01 = 557.41 : x
  2. Step 2: Convert to fraction form
    631.54/868.01 = 557.41/x
  3. Step 3: Cross multiply
    631.54x = 868.01 × 557.41
  4. Step 4: Simplify right side
    631.54x = 483,837.45
  5. Step 5: Solve for x
    x = 483,837.45/631.54
  6. Step 6: Final answer
    x = 766.12

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.