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Finding the Fourth Proportional to 1,112.51, 1,668.96 and 372.17

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Solution

The fourth proportional to 1,112.51, 1,668.96 and 372.17 is: 558.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.51 : 1,668.96 = 372.17 : x
  2. Step 2: Convert to fraction form
    1,112.51/1,668.96 = 372.17/x
  3. Step 3: Cross multiply
    1,112.51x = 1,668.96 × 372.17
  4. Step 4: Simplify right side
    1,112.51x = 621,141.02
  5. Step 5: Solve for x
    x = 621,141.02/1,112.51
  6. Step 6: Final answer
    x = 558.32

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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.