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Finding the Fourth Proportional to 1,233.16, 1,702.30 and 860.68

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Solution

The fourth proportional to 1,233.16, 1,702.30 and 860.68 is: 1,188.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.16 : 1,702.30 = 860.68 : x
  2. Step 2: Convert to fraction form
    1,233.16/1,702.30 = 860.68/x
  3. Step 3: Cross multiply
    1,233.16x = 1,702.30 × 860.68
  4. Step 4: Simplify right side
    1,233.16x = 1,465,135.56
  5. Step 5: Solve for x
    x = 1,465,135.56/1,233.16
  6. Step 6: Final answer
    x = 1,188.11

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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.