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Finding the Fourth Proportional to 1,146.83, 1,718.10 and 658.40

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Solution

The fourth proportional to 1,146.83, 1,718.10 and 658.40 is: 986.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.83 : 1,718.10 = 658.40 : x
  2. Step 2: Convert to fraction form
    1,146.83/1,718.10 = 658.40/x
  3. Step 3: Cross multiply
    1,146.83x = 1,718.10 × 658.40
  4. Step 4: Simplify right side
    1,146.83x = 1,131,188.45
  5. Step 5: Solve for x
    x = 1,131,188.45/1,146.83
  6. Step 6: Final answer
    x = 986.37

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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.