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Finding the Fourth Proportional to 1,185.54, 1,773.45 and 988.71

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Solution

The fourth proportional to 1,185.54, 1,773.45 and 988.71 is: 1,479.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.54 : 1,773.45 = 988.71 : x
  2. Step 2: Convert to fraction form
    1,185.54/1,773.45 = 988.71/x
  3. Step 3: Cross multiply
    1,185.54x = 1,773.45 × 988.71
  4. Step 4: Simplify right side
    1,185.54x = 1,753,427.75
  5. Step 5: Solve for x
    x = 1,753,427.75/1,185.54
  6. Step 6: Final answer
    x = 1,479.01

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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.