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Finding the Fourth Proportional to 709.22, 979.01 and 690.59

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Solution

The fourth proportional to 709.22, 979.01 and 690.59 is: 953.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.22 : 979.01 = 690.59 : x
  2. Step 2: Convert to fraction form
    709.22/979.01 = 690.59/x
  3. Step 3: Cross multiply
    709.22x = 979.01 × 690.59
  4. Step 4: Simplify right side
    709.22x = 676,096.10
  5. Step 5: Solve for x
    x = 676,096.10/709.22
  6. Step 6: Final answer
    x = 953.29

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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.