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Finding the Fourth Proportional to 701.52, 968.40 and 687.12

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Solution

The fourth proportional to 701.52, 968.40 and 687.12 is: 948.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.52 : 968.40 = 687.12 : x
  2. Step 2: Convert to fraction form
    701.52/968.40 = 687.12/x
  3. Step 3: Cross multiply
    701.52x = 968.40 × 687.12
  4. Step 4: Simplify right side
    701.52x = 665,407.01
  5. Step 5: Solve for x
    x = 665,407.01/701.52
  6. Step 6: Final answer
    x = 948.52

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1.5x scale

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.