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Finding the Fourth Proportional to 1,199.62, 1,655.50 and 702.62

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Solution

The fourth proportional to 1,199.62, 1,655.50 and 702.62 is: 969.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.62 : 1,655.50 = 702.62 : x
  2. Step 2: Convert to fraction form
    1,199.62/1,655.50 = 702.62/x
  3. Step 3: Cross multiply
    1,199.62x = 1,655.50 × 702.62
  4. Step 4: Simplify right side
    1,199.62x = 1,163,177.38
  5. Step 5: Solve for x
    x = 1,163,177.38/1,199.62
  6. Step 6: Final answer
    x = 969.62

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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.