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Finding the Fourth Proportional to 1,105.19, 1,657.78 and 283.46

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Solution

The fourth proportional to 1,105.19, 1,657.78 and 283.46 is: 425.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.19 : 1,657.78 = 283.46 : x
  2. Step 2: Convert to fraction form
    1,105.19/1,657.78 = 283.46/x
  3. Step 3: Cross multiply
    1,105.19x = 1,657.78 × 283.46
  4. Step 4: Simplify right side
    1,105.19x = 469,911.12
  5. Step 5: Solve for x
    x = 469,911.12/1,105.19
  6. Step 6: Final answer
    x = 425.19

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Double scale
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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.