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Finding the Fourth Proportional to 1,657.84, 2,287.88 and 911.83

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Solution

The fourth proportional to 1,657.84, 2,287.88 and 911.83 is: 1,258.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.84 : 2,287.88 = 911.83 : x
  2. Step 2: Convert to fraction form
    1,657.84/2,287.88 = 911.83/x
  3. Step 3: Cross multiply
    1,657.84x = 2,287.88 × 911.83
  4. Step 4: Simplify right side
    1,657.84x = 2,086,157.62
  5. Step 5: Solve for x
    x = 2,086,157.62/1,657.84
  6. Step 6: Final answer
    x = 1,258.36

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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.