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Finding the Fourth Proportional to 696.22, 953.44 and 687.11

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Solution

The fourth proportional to 696.22, 953.44 and 687.11 is: 940.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.22 : 953.44 = 687.11 : x
  2. Step 2: Convert to fraction form
    696.22/953.44 = 687.11/x
  3. Step 3: Cross multiply
    696.22x = 953.44 × 687.11
  4. Step 4: Simplify right side
    696.22x = 655,111.67
  5. Step 5: Solve for x
    x = 655,111.67/696.22
  6. Step 6: Final answer
    x = 940.96

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1.5x scale

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.