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Finding the Fourth Proportional to 633.21, 948.34 and 611.31

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Solution

The fourth proportional to 633.21, 948.34 and 611.31 is: 915.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.21 : 948.34 = 611.31 : x
  2. Step 2: Convert to fraction form
    633.21/948.34 = 611.31/x
  3. Step 3: Cross multiply
    633.21x = 948.34 × 611.31
  4. Step 4: Simplify right side
    633.21x = 579,728.20
  5. Step 5: Solve for x
    x = 579,728.20/633.21
  6. Step 6: Final answer
    x = 915.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.