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Finding the Fourth Proportional to 662.61, 988.08 and 616.44

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Solution

The fourth proportional to 662.61, 988.08 and 616.44 is: 919.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.61 : 988.08 = 616.44 : x
  2. Step 2: Convert to fraction form
    662.61/988.08 = 616.44/x
  3. Step 3: Cross multiply
    662.61x = 988.08 × 616.44
  4. Step 4: Simplify right side
    662.61x = 609,092.04
  5. Step 5: Solve for x
    x = 609,092.04/662.61
  6. Step 6: Final answer
    x = 919.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.