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Finding the Fourth Proportional to 988.94, 1,481.40 and 617.53

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Solution

The fourth proportional to 988.94, 1,481.40 and 617.53 is: 925.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.94 : 1,481.40 = 617.53 : x
  2. Step 2: Convert to fraction form
    988.94/1,481.40 = 617.53/x
  3. Step 3: Cross multiply
    988.94x = 1,481.40 × 617.53
  4. Step 4: Simplify right side
    988.94x = 914,808.94
  5. Step 5: Solve for x
    x = 914,808.94/988.94
  6. Step 6: Final answer
    x = 925.04

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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.