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Finding the Fourth Proportional to 526.81, 790.19 and 136.81

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Solution

The fourth proportional to 526.81, 790.19 and 136.81 is: 205.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.81 : 790.19 = 136.81 : x
  2. Step 2: Convert to fraction form
    526.81/790.19 = 136.81/x
  3. Step 3: Cross multiply
    526.81x = 790.19 × 136.81
  4. Step 4: Simplify right side
    526.81x = 108,105.89
  5. Step 5: Solve for x
    x = 108,105.89/526.81
  6. Step 6: Final answer
    x = 205.21

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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.