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Finding the Fourth Proportional to 1,170.50, 1,615.13 and 698.59

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Solution

The fourth proportional to 1,170.50, 1,615.13 and 698.59 is: 963.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.50 : 1,615.13 = 698.59 : x
  2. Step 2: Convert to fraction form
    1,170.50/1,615.13 = 698.59/x
  3. Step 3: Cross multiply
    1,170.50x = 1,615.13 × 698.59
  4. Step 4: Simplify right side
    1,170.50x = 1,128,311.44
  5. Step 5: Solve for x
    x = 1,128,311.44/1,170.50
  6. Step 6: Final answer
    x = 963.96

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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.