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Finding the Fourth Proportional to 718.03, 985.52 and 687.97

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Solution

The fourth proportional to 718.03, 985.52 and 687.97 is: 944.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.03 : 985.52 = 687.97 : x
  2. Step 2: Convert to fraction form
    718.03/985.52 = 687.97/x
  3. Step 3: Cross multiply
    718.03x = 985.52 × 687.97
  4. Step 4: Simplify right side
    718.03x = 678,008.19
  5. Step 5: Solve for x
    x = 678,008.19/718.03
  6. Step 6: Final answer
    x = 944.26

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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.