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Finding the Fourth Proportional to 1,127.86, 1,691.81 and 608.29

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Solution

The fourth proportional to 1,127.86, 1,691.81 and 608.29 is: 912.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.86 : 1,691.81 = 608.29 : x
  2. Step 2: Convert to fraction form
    1,127.86/1,691.81 = 608.29/x
  3. Step 3: Cross multiply
    1,127.86x = 1,691.81 × 608.29
  4. Step 4: Simplify right side
    1,127.86x = 1,029,111.10
  5. Step 5: Solve for x
    x = 1,029,111.10/1,127.86
  6. Step 6: Final answer
    x = 912.45

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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.