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Finding the Fourth Proportional to 1,689.26, 2,533.27 and 715.43

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Solution

The fourth proportional to 1,689.26, 2,533.27 and 715.43 is: 1,072.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.26 : 2,533.27 = 715.43 : x
  2. Step 2: Convert to fraction form
    1,689.26/2,533.27 = 715.43/x
  3. Step 3: Cross multiply
    1,689.26x = 2,533.27 × 715.43
  4. Step 4: Simplify right side
    1,689.26x = 1,812,377.36
  5. Step 5: Solve for x
    x = 1,812,377.36/1,689.26
  6. Step 6: Final answer
    x = 1,072.88

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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.