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Finding the Fourth Proportional to 356.10, 533.95 and 191.67

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Solution

The fourth proportional to 356.10, 533.95 and 191.67 is: 287.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.10 : 533.95 = 191.67 : x
  2. Step 2: Convert to fraction form
    356.10/533.95 = 191.67/x
  3. Step 3: Cross multiply
    356.10x = 533.95 × 191.67
  4. Step 4: Simplify right side
    356.10x = 102,341.72
  5. Step 5: Solve for x
    x = 102,341.72/356.10
  6. Step 6: Final answer
    x = 287.40

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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.