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Finding the Fourth Proportional to 527.20, 727.20 and 340.56

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Solution

The fourth proportional to 527.20, 727.20 and 340.56 is: 469.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.20 : 727.20 = 340.56 : x
  2. Step 2: Convert to fraction form
    527.20/727.20 = 340.56/x
  3. Step 3: Cross multiply
    527.20x = 727.20 × 340.56
  4. Step 4: Simplify right side
    527.20x = 247,655.23
  5. Step 5: Solve for x
    x = 247,655.23/527.20
  6. Step 6: Final answer
    x = 469.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.