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Finding the Fourth Proportional to 1,146.89, 1,586.87 and 999.83

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Solution

The fourth proportional to 1,146.89, 1,586.87 and 999.83 is: 1,383.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.89 : 1,586.87 = 999.83 : x
  2. Step 2: Convert to fraction form
    1,146.89/1,586.87 = 999.83/x
  3. Step 3: Cross multiply
    1,146.89x = 1,586.87 × 999.83
  4. Step 4: Simplify right side
    1,146.89x = 1,586,587.30
  5. Step 5: Solve for x
    x = 1,586,587.30/1,146.89
  6. Step 6: Final answer
    x = 1,383.39

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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.