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Finding the Fourth Proportional to 735.70, 1,102.35 and 613.30

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Solution

The fourth proportional to 735.70, 1,102.35 and 613.30 is: 918.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.70 : 1,102.35 = 613.30 : x
  2. Step 2: Convert to fraction form
    735.70/1,102.35 = 613.30/x
  3. Step 3: Cross multiply
    735.70x = 1,102.35 × 613.30
  4. Step 4: Simplify right side
    735.70x = 676,071.26
  5. Step 5: Solve for x
    x = 676,071.26/735.70
  6. Step 6: Final answer
    x = 918.95

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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.