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Finding the Fourth Proportional to 1,111.91, 1,671.11 and 535.19

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Solution

The fourth proportional to 1,111.91, 1,671.11 and 535.19 is: 804.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.91 : 1,671.11 = 535.19 : x
  2. Step 2: Convert to fraction form
    1,111.91/1,671.11 = 535.19/x
  3. Step 3: Cross multiply
    1,111.91x = 1,671.11 × 535.19
  4. Step 4: Simplify right side
    1,111.91x = 894,358.68
  5. Step 5: Solve for x
    x = 894,358.68/1,111.91
  6. Step 6: Final answer
    x = 804.34

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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.