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Finding the Fourth Proportional to 370.22, 510.85 and 212.88

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Solution

The fourth proportional to 370.22, 510.85 and 212.88 is: 293.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.22 : 510.85 = 212.88 : x
  2. Step 2: Convert to fraction form
    370.22/510.85 = 212.88/x
  3. Step 3: Cross multiply
    370.22x = 510.85 × 212.88
  4. Step 4: Simplify right side
    370.22x = 108,749.75
  5. Step 5: Solve for x
    x = 108,749.75/370.22
  6. Step 6: Final answer
    x = 293.74

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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.