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Finding the Fourth Proportional to 1,773.12, 2,447.02 and 987.17

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Solution

The fourth proportional to 1,773.12, 2,447.02 and 987.17 is: 1,362.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,773.12 : 2,447.02 = 987.17 : x
  2. Step 2: Convert to fraction form
    1,773.12/2,447.02 = 987.17/x
  3. Step 3: Cross multiply
    1,773.12x = 2,447.02 × 987.17
  4. Step 4: Simplify right side
    1,773.12x = 2,415,610.03
  5. Step 5: Solve for x
    x = 2,415,610.03/1,773.12
  6. Step 6: Final answer
    x = 1,362.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.