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Finding the Fourth Proportional to 526.53, 790.19 and 197.78

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Solution

The fourth proportional to 526.53, 790.19 and 197.78 is: 296.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.53 : 790.19 = 197.78 : x
  2. Step 2: Convert to fraction form
    526.53/790.19 = 197.78/x
  3. Step 3: Cross multiply
    526.53x = 790.19 × 197.78
  4. Step 4: Simplify right side
    526.53x = 156,278.84
  5. Step 5: Solve for x
    x = 156,278.84/526.53
  6. Step 6: Final answer
    x = 296.81

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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.