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Finding the Fourth Proportional to 1,059.68, 1,590.06 and 979.49

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Solution

The fourth proportional to 1,059.68, 1,590.06 and 979.49 is: 1,469.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.68 : 1,590.06 = 979.49 : x
  2. Step 2: Convert to fraction form
    1,059.68/1,590.06 = 979.49/x
  3. Step 3: Cross multiply
    1,059.68x = 1,590.06 × 979.49
  4. Step 4: Simplify right side
    1,059.68x = 1,557,447.87
  5. Step 5: Solve for x
    x = 1,557,447.87/1,059.68
  6. Step 6: Final answer
    x = 1,469.73

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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.