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Finding the Fourth Proportional to 397.68, 596.26 and 215.02

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Solution

The fourth proportional to 397.68, 596.26 and 215.02 is: 322.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.68 : 596.26 = 215.02 : x
  2. Step 2: Convert to fraction form
    397.68/596.26 = 215.02/x
  3. Step 3: Cross multiply
    397.68x = 596.26 × 215.02
  4. Step 4: Simplify right side
    397.68x = 128,207.83
  5. Step 5: Solve for x
    x = 128,207.83/397.68
  6. Step 6: Final answer
    x = 322.39

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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.