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Finding the Fourth Proportional to 701.64, 967.10 and 642.81

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Solution

The fourth proportional to 701.64, 967.10 and 642.81 is: 886.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.64 : 967.10 = 642.81 : x
  2. Step 2: Convert to fraction form
    701.64/967.10 = 642.81/x
  3. Step 3: Cross multiply
    701.64x = 967.10 × 642.81
  4. Step 4: Simplify right side
    701.64x = 621,658.34
  5. Step 5: Solve for x
    x = 621,658.34/701.64
  6. Step 6: Final answer
    x = 886.01

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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.