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Finding the Fourth Proportional to 1,568.44, 2,164.45 and 869.95

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Solution

The fourth proportional to 1,568.44, 2,164.45 and 869.95 is: 1,200.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,568.44 : 2,164.45 = 869.95 : x
  2. Step 2: Convert to fraction form
    1,568.44/2,164.45 = 869.95/x
  3. Step 3: Cross multiply
    1,568.44x = 2,164.45 × 869.95
  4. Step 4: Simplify right side
    1,568.44x = 1,882,955.69
  5. Step 5: Solve for x
    x = 1,882,955.69/1,568.44
  6. Step 6: Final answer
    x = 1,200.53

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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.