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Finding the Fourth Proportional to 370.21, 510.82 and 220.88

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Solution

The fourth proportional to 370.21, 510.82 and 220.88 is: 304.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.21 : 510.82 = 220.88 : x
  2. Step 2: Convert to fraction form
    370.21/510.82 = 220.88/x
  3. Step 3: Cross multiply
    370.21x = 510.82 × 220.88
  4. Step 4: Simplify right side
    370.21x = 112,829.92
  5. Step 5: Solve for x
    x = 112,829.92/370.21
  6. Step 6: Final answer
    x = 304.77

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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.