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Finding the Fourth Proportional to 314.74, 471.59 and 109.20

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Solution

The fourth proportional to 314.74, 471.59 and 109.20 is: 163.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.74 : 471.59 = 109.20 : x
  2. Step 2: Convert to fraction form
    314.74/471.59 = 109.20/x
  3. Step 3: Cross multiply
    314.74x = 471.59 × 109.20
  4. Step 4: Simplify right side
    314.74x = 51,497.63
  5. Step 5: Solve for x
    x = 51,497.63/314.74
  6. Step 6: Final answer
    x = 163.62

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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.