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Finding the Fourth Proportional to 709.68, 1,063.55 and 605.03

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Solution

The fourth proportional to 709.68, 1,063.55 and 605.03 is: 906.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.68 : 1,063.55 = 605.03 : x
  2. Step 2: Convert to fraction form
    709.68/1,063.55 = 605.03/x
  3. Step 3: Cross multiply
    709.68x = 1,063.55 × 605.03
  4. Step 4: Simplify right side
    709.68x = 643,471.31
  5. Step 5: Solve for x
    x = 643,471.31/709.68
  6. Step 6: Final answer
    x = 906.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.