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Finding the Fourth Proportional to 910.38, 1,365.58 and 728.14

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Solution

The fourth proportional to 910.38, 1,365.58 and 728.14 is: 1,092.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.38 : 1,365.58 = 728.14 : x
  2. Step 2: Convert to fraction form
    910.38/1,365.58 = 728.14/x
  3. Step 3: Cross multiply
    910.38x = 1,365.58 × 728.14
  4. Step 4: Simplify right side
    910.38x = 994,333.42
  5. Step 5: Solve for x
    x = 994,333.42/910.38
  6. Step 6: Final answer
    x = 1,092.22

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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.