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Finding the Fourth Proportional to 1,199.79, 1,655.14 and 702.12

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Solution

The fourth proportional to 1,199.79, 1,655.14 and 702.12 is: 968.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.79 : 1,655.14 = 702.12 : x
  2. Step 2: Convert to fraction form
    1,199.79/1,655.14 = 702.12/x
  3. Step 3: Cross multiply
    1,199.79x = 1,655.14 × 702.12
  4. Step 4: Simplify right side
    1,199.79x = 1,162,105.14
  5. Step 5: Solve for x
    x = 1,162,105.14/1,199.79
  6. Step 6: Final answer
    x = 968.59

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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.