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Finding the Fourth Proportional to 1,105, 1,657.47 and 283.25

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Solution

The fourth proportional to 1,105, 1,657.47 and 283.25 is: 424.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105 : 1,657.47 = 283.25 : x
  2. Step 2: Convert to fraction form
    1,105/1,657.47 = 283.25/x
  3. Step 3: Cross multiply
    1,105x = 1,657.47 × 283.25
  4. Step 4: Simplify right side
    1,105x = 469,478.38
  5. Step 5: Solve for x
    x = 469,478.38/1,105
  6. Step 6: Final answer
    x = 424.87

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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.