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Finding the Fourth Proportional to 527.08, 789.66 and 515.56

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Solution

The fourth proportional to 527.08, 789.66 and 515.56 is: 772.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.08 : 789.66 = 515.56 : x
  2. Step 2: Convert to fraction form
    527.08/789.66 = 515.56/x
  3. Step 3: Cross multiply
    527.08x = 789.66 × 515.56
  4. Step 4: Simplify right side
    527.08x = 407,117.11
  5. Step 5: Solve for x
    x = 407,117.11/527.08
  6. Step 6: Final answer
    x = 772.40

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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.