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Finding the Fourth Proportional to 215.48, 297.30 and 145.67

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Solution

The fourth proportional to 215.48, 297.30 and 145.67 is: 200.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.48 : 297.30 = 145.67 : x
  2. Step 2: Convert to fraction form
    215.48/297.30 = 145.67/x
  3. Step 3: Cross multiply
    215.48x = 297.30 × 145.67
  4. Step 4: Simplify right side
    215.48x = 43,306.20
  5. Step 5: Solve for x
    x = 43,306.20/215.48
  6. Step 6: Final answer
    x = 200.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.