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Finding the Fourth Proportional to 1,112.05, 1,666.93 and 803.13

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Solution

The fourth proportional to 1,112.05, 1,666.93 and 803.13 is: 1,203.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.05 : 1,666.93 = 803.13 : x
  2. Step 2: Convert to fraction form
    1,112.05/1,666.93 = 803.13/x
  3. Step 3: Cross multiply
    1,112.05x = 1,666.93 × 803.13
  4. Step 4: Simplify right side
    1,112.05x = 1,338,764.11
  5. Step 5: Solve for x
    x = 1,338,764.11/1,112.05
  6. Step 6: Final answer
    x = 1,203.88

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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.