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Finding the Fourth Proportional to 2,215.90, 3,324.02 and 572.45

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Solution

The fourth proportional to 2,215.90, 3,324.02 and 572.45 is: 858.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.90 : 3,324.02 = 572.45 : x
  2. Step 2: Convert to fraction form
    2,215.90/3,324.02 = 572.45/x
  3. Step 3: Cross multiply
    2,215.90x = 3,324.02 × 572.45
  4. Step 4: Simplify right side
    2,215.90x = 1,902,818.63
  5. Step 5: Solve for x
    x = 1,902,818.63/2,215.90
  6. Step 6: Final answer
    x = 858.71

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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.