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Finding the Fourth Proportional to 1,111.66, 1,668.38 and 564.24

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Solution

The fourth proportional to 1,111.66, 1,668.38 and 564.24 is: 846.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.66 : 1,668.38 = 564.24 : x
  2. Step 2: Convert to fraction form
    1,111.66/1,668.38 = 564.24/x
  3. Step 3: Cross multiply
    1,111.66x = 1,668.38 × 564.24
  4. Step 4: Simplify right side
    1,111.66x = 941,366.73
  5. Step 5: Solve for x
    x = 941,366.73/1,111.66
  6. Step 6: Final answer
    x = 846.81

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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.