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Finding the Fourth Proportional to 527.78, 789.35 and 479.34

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Solution

The fourth proportional to 527.78, 789.35 and 479.34 is: 716.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.78 : 789.35 = 479.34 : x
  2. Step 2: Convert to fraction form
    527.78/789.35 = 479.34/x
  3. Step 3: Cross multiply
    527.78x = 789.35 × 479.34
  4. Step 4: Simplify right side
    527.78x = 378,364.63
  5. Step 5: Solve for x
    x = 378,364.63/527.78
  6. Step 6: Final answer
    x = 716.89

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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.