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Finding the Fourth Proportional to 1,543.15, 2,315.09 and 447.54

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Solution

The fourth proportional to 1,543.15, 2,315.09 and 447.54 is: 671.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.15 : 2,315.09 = 447.54 : x
  2. Step 2: Convert to fraction form
    1,543.15/2,315.09 = 447.54/x
  3. Step 3: Cross multiply
    1,543.15x = 2,315.09 × 447.54
  4. Step 4: Simplify right side
    1,543.15x = 1,036,095.38
  5. Step 5: Solve for x
    x = 1,036,095.38/1,543.15
  6. Step 6: Final answer
    x = 671.42

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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.