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Finding the Fourth Proportional to 340.29, 509.90 and 177.75

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Solution

The fourth proportional to 340.29, 509.90 and 177.75 is: 266.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.29 : 509.90 = 177.75 : x
  2. Step 2: Convert to fraction form
    340.29/509.90 = 177.75/x
  3. Step 3: Cross multiply
    340.29x = 509.90 × 177.75
  4. Step 4: Simplify right side
    340.29x = 90,633.84
  5. Step 5: Solve for x
    x = 90,633.84/340.29
  6. Step 6: Final answer
    x = 266.34

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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.