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Finding the Fourth Proportional to 1,351.10, 1,864.45 and 908.93

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Solution

The fourth proportional to 1,351.10, 1,864.45 and 908.93 is: 1,254.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.10 : 1,864.45 = 908.93 : x
  2. Step 2: Convert to fraction form
    1,351.10/1,864.45 = 908.93/x
  3. Step 3: Cross multiply
    1,351.10x = 1,864.45 × 908.93
  4. Step 4: Simplify right side
    1,351.10x = 1,694,654.54
  5. Step 5: Solve for x
    x = 1,694,654.54/1,351.10
  6. Step 6: Final answer
    x = 1,254.28

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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.