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Finding the Fourth Proportional to 1,657.50, 2,287.41 and 911.52

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Solution

The fourth proportional to 1,657.50, 2,287.41 and 911.52 is: 1,257.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.50 : 2,287.41 = 911.52 : x
  2. Step 2: Convert to fraction form
    1,657.50/2,287.41 = 911.52/x
  3. Step 3: Cross multiply
    1,657.50x = 2,287.41 × 911.52
  4. Step 4: Simplify right side
    1,657.50x = 2,085,006.25
  5. Step 5: Solve for x
    x = 2,085,006.25/1,657.50
  6. Step 6: Final answer
    x = 1,257.92

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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.