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Finding the Fourth Proportional to 1,243.10, 1,862.64 and 658.07

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Solution

The fourth proportional to 1,243.10, 1,862.64 and 658.07 is: 986.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.10 : 1,862.64 = 658.07 : x
  2. Step 2: Convert to fraction form
    1,243.10/1,862.64 = 658.07/x
  3. Step 3: Cross multiply
    1,243.10x = 1,862.64 × 658.07
  4. Step 4: Simplify right side
    1,243.10x = 1,225,747.50
  5. Step 5: Solve for x
    x = 1,225,747.50/1,243.10
  6. Step 6: Final answer
    x = 986.04

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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.