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Finding the Fourth Proportional to 340.11, 509.71 and 123.48

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Solution

The fourth proportional to 340.11, 509.71 and 123.48 is: 185.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.11 : 509.71 = 123.48 : x
  2. Step 2: Convert to fraction form
    340.11/509.71 = 123.48/x
  3. Step 3: Cross multiply
    340.11x = 509.71 × 123.48
  4. Step 4: Simplify right side
    340.11x = 62,938.99
  5. Step 5: Solve for x
    x = 62,938.99/340.11
  6. Step 6: Final answer
    x = 185.05

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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.