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Finding the Fourth Proportional to 297.59, 445.57 and 215.40

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Solution

The fourth proportional to 297.59, 445.57 and 215.40 is: 322.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.59 : 445.57 = 215.40 : x
  2. Step 2: Convert to fraction form
    297.59/445.57 = 215.40/x
  3. Step 3: Cross multiply
    297.59x = 445.57 × 215.40
  4. Step 4: Simplify right side
    297.59x = 95,975.78
  5. Step 5: Solve for x
    x = 95,975.78/297.59
  6. Step 6: Final answer
    x = 322.51

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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.