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Finding the Fourth Proportional to 1,657.59, 2,287.50 and 911.58

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Solution

The fourth proportional to 1,657.59, 2,287.50 and 911.58 is: 1,257.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.59 : 2,287.50 = 911.58 : x
  2. Step 2: Convert to fraction form
    1,657.59/2,287.50 = 911.58/x
  3. Step 3: Cross multiply
    1,657.59x = 2,287.50 × 911.58
  4. Step 4: Simplify right side
    1,657.59x = 2,085,239.25
  5. Step 5: Solve for x
    x = 2,085,239.25/1,657.59
  6. Step 6: Final answer
    x = 1,257.99

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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.