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Finding the Fourth Proportional to 526.47, 789.71 and 141.72

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Solution

The fourth proportional to 526.47, 789.71 and 141.72 is: 212.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.47 : 789.71 = 141.72 : x
  2. Step 2: Convert to fraction form
    526.47/789.71 = 141.72/x
  3. Step 3: Cross multiply
    526.47x = 789.71 × 141.72
  4. Step 4: Simplify right side
    526.47x = 111,917.70
  5. Step 5: Solve for x
    x = 111,917.70/526.47
  6. Step 6: Final answer
    x = 212.58

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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.