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Finding the Fourth Proportional to 2,102.87, 3,154.54 and 715.95

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Solution

The fourth proportional to 2,102.87, 3,154.54 and 715.95 is: 1,074.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.87 : 3,154.54 = 715.95 : x
  2. Step 2: Convert to fraction form
    2,102.87/3,154.54 = 715.95/x
  3. Step 3: Cross multiply
    2,102.87x = 3,154.54 × 715.95
  4. Step 4: Simplify right side
    2,102.87x = 2,258,481.58
  5. Step 5: Solve for x
    x = 2,258,481.58/2,102.87
  6. Step 6: Final answer
    x = 1,074.00

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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.