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Finding the Fourth Proportional to 1,528.78, 2,293.17 and 707.65

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Solution

The fourth proportional to 1,528.78, 2,293.17 and 707.65 is: 1,061.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.78 : 2,293.17 = 707.65 : x
  2. Step 2: Convert to fraction form
    1,528.78/2,293.17 = 707.65/x
  3. Step 3: Cross multiply
    1,528.78x = 2,293.17 × 707.65
  4. Step 4: Simplify right side
    1,528.78x = 1,622,761.75
  5. Step 5: Solve for x
    x = 1,622,761.75/1,528.78
  6. Step 6: Final answer
    x = 1,061.48

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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.