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Finding the Fourth Proportional to 709.89, 1,064.75 and 189.93

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Solution

The fourth proportional to 709.89, 1,064.75 and 189.93 is: 284.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.89 : 1,064.75 = 189.93 : x
  2. Step 2: Convert to fraction form
    709.89/1,064.75 = 189.93/x
  3. Step 3: Cross multiply
    709.89x = 1,064.75 × 189.93
  4. Step 4: Simplify right side
    709.89x = 202,227.97
  5. Step 5: Solve for x
    x = 202,227.97/709.89
  6. Step 6: Final answer
    x = 284.87

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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.