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Finding the Fourth Proportional to 356.76, 535.14 and 311.67

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Solution

The fourth proportional to 356.76, 535.14 and 311.67 is: 467.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.76 : 535.14 = 311.67 : x
  2. Step 2: Convert to fraction form
    356.76/535.14 = 311.67/x
  3. Step 3: Cross multiply
    356.76x = 535.14 × 311.67
  4. Step 4: Simplify right side
    356.76x = 166,787.08
  5. Step 5: Solve for x
    x = 166,787.08/356.76
  6. Step 6: Final answer
    x = 467.51

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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.