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Finding the Fourth Proportional to 314.40, 471.80 and 122

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Solution

The fourth proportional to 314.40, 471.80 and 122 is: 183.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.40 : 471.80 = 122 : x
  2. Step 2: Convert to fraction form
    314.40/471.80 = 122/x
  3. Step 3: Cross multiply
    314.40x = 471.80 × 122
  4. Step 4: Simplify right side
    314.40x = 57,559.60
  5. Step 5: Solve for x
    x = 57,559.60/314.40
  6. Step 6: Final answer
    x = 183.08

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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.