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Finding the Fourth Proportional to 979.06, 1,349.59 and 730

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Solution

The fourth proportional to 979.06, 1,349.59 and 730 is: 1,006.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.06 : 1,349.59 = 730 : x
  2. Step 2: Convert to fraction form
    979.06/1,349.59 = 730/x
  3. Step 3: Cross multiply
    979.06x = 1,349.59 × 730
  4. Step 4: Simplify right side
    979.06x = 985,200.70
  5. Step 5: Solve for x
    x = 985,200.70/979.06
  6. Step 6: Final answer
    x = 1,006.27

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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.