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Finding the Fourth Proportional to 1,108.33, 1,670.27 and 998.77

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Solution

The fourth proportional to 1,108.33, 1,670.27 and 998.77 is: 1,505.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.33 : 1,670.27 = 998.77 : x
  2. Step 2: Convert to fraction form
    1,108.33/1,670.27 = 998.77/x
  3. Step 3: Cross multiply
    1,108.33x = 1,670.27 × 998.77
  4. Step 4: Simplify right side
    1,108.33x = 1,668,204.31
  5. Step 5: Solve for x
    x = 1,668,204.31/1,108.33
  6. Step 6: Final answer
    x = 1,505.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.