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Finding the Fourth Proportional to 1,248.72, 1,872.93 and 324.29

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Solution

The fourth proportional to 1,248.72, 1,872.93 and 324.29 is: 486.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.72 : 1,872.93 = 324.29 : x
  2. Step 2: Convert to fraction form
    1,248.72/1,872.93 = 324.29/x
  3. Step 3: Cross multiply
    1,248.72x = 1,872.93 × 324.29
  4. Step 4: Simplify right side
    1,248.72x = 607,363.11
  5. Step 5: Solve for x
    x = 607,363.11/1,248.72
  6. Step 6: Final answer
    x = 486.39

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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.