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Finding the Fourth Proportional to 1,114.67, 1,672.17 and 384.08

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Solution

The fourth proportional to 1,114.67, 1,672.17 and 384.08 is: 576.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.67 : 1,672.17 = 384.08 : x
  2. Step 2: Convert to fraction form
    1,114.67/1,672.17 = 384.08/x
  3. Step 3: Cross multiply
    1,114.67x = 1,672.17 × 384.08
  4. Step 4: Simplify right side
    1,114.67x = 642,247.05
  5. Step 5: Solve for x
    x = 642,247.05/1,114.67
  6. Step 6: Final answer
    x = 576.18

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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.