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Finding the Fourth Proportional to 527.61, 790.11 and 393.72

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Solution

The fourth proportional to 527.61, 790.11 and 393.72 is: 589.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.61 : 790.11 = 393.72 : x
  2. Step 2: Convert to fraction form
    527.61/790.11 = 393.72/x
  3. Step 3: Cross multiply
    527.61x = 790.11 × 393.72
  4. Step 4: Simplify right side
    527.61x = 311,082.11
  5. Step 5: Solve for x
    x = 311,082.11/527.61
  6. Step 6: Final answer
    x = 589.61

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Double scale
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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.