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Finding the Fourth Proportional to 1,104.44, 1,657.84 and 988.16

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Solution

The fourth proportional to 1,104.44, 1,657.84 and 988.16 is: 1,483.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.44 : 1,657.84 = 988.16 : x
  2. Step 2: Convert to fraction form
    1,104.44/1,657.84 = 988.16/x
  3. Step 3: Cross multiply
    1,104.44x = 1,657.84 × 988.16
  4. Step 4: Simplify right side
    1,104.44x = 1,638,211.17
  5. Step 5: Solve for x
    x = 1,638,211.17/1,104.44
  6. Step 6: Final answer
    x = 1,483.30

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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.