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Finding the Fourth Proportional to 1,773.52, 2,447.12 and 987.57

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Solution

The fourth proportional to 1,773.52, 2,447.12 and 987.57 is: 1,362.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,773.52 : 2,447.12 = 987.57 : x
  2. Step 2: Convert to fraction form
    1,773.52/2,447.12 = 987.57/x
  3. Step 3: Cross multiply
    1,773.52x = 2,447.12 × 987.57
  4. Step 4: Simplify right side
    1,773.52x = 2,416,685.12
  5. Step 5: Solve for x
    x = 2,416,685.12/1,773.52
  6. Step 6: Final answer
    x = 1,362.65

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1.5x scale

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.