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Finding the Fourth Proportional to 1,915.42, 2,873.14 and 761.17

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Solution

The fourth proportional to 1,915.42, 2,873.14 and 761.17 is: 1,141.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.42 : 2,873.14 = 761.17 : x
  2. Step 2: Convert to fraction form
    1,915.42/2,873.14 = 761.17/x
  3. Step 3: Cross multiply
    1,915.42x = 2,873.14 × 761.17
  4. Step 4: Simplify right side
    1,915.42x = 2,186,947.97
  5. Step 5: Solve for x
    x = 2,186,947.97/1,915.42
  6. Step 6: Final answer
    x = 1,141.76

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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.