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Finding the Fourth Proportional to 210, 314.67 and 123.36

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Solution

The fourth proportional to 210, 314.67 and 123.36 is: 184.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    210 : 314.67 = 123.36 : x
  2. Step 2: Convert to fraction form
    210/314.67 = 123.36/x
  3. Step 3: Cross multiply
    210x = 314.67 × 123.36
  4. Step 4: Simplify right side
    210x = 38,817.69
  5. Step 5: Solve for x
    x = 38,817.69/210
  6. Step 6: Final answer
    x = 184.85

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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.