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Finding the Fourth Proportional to 527.20, 790.76 and 198.07

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Solution

The fourth proportional to 527.20, 790.76 and 198.07 is: 297.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.20 : 790.76 = 198.07 : x
  2. Step 2: Convert to fraction form
    527.20/790.76 = 198.07/x
  3. Step 3: Cross multiply
    527.20x = 790.76 × 198.07
  4. Step 4: Simplify right side
    527.20x = 156,620.89
  5. Step 5: Solve for x
    x = 156,620.89/527.20
  6. Step 6: Final answer
    x = 297.08

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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.