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Finding the Fourth Proportional to 340.53, 470.15 and 221.11

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Solution

The fourth proportional to 340.53, 470.15 and 221.11 is: 305.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.53 : 470.15 = 221.11 : x
  2. Step 2: Convert to fraction form
    340.53/470.15 = 221.11/x
  3. Step 3: Cross multiply
    340.53x = 470.15 × 221.11
  4. Step 4: Simplify right side
    340.53x = 103,953.41
  5. Step 5: Solve for x
    x = 103,953.41/340.53
  6. Step 6: Final answer
    x = 305.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.