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Finding the Fourth Proportional to 340.80, 470.78 and 303.94

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Solution

The fourth proportional to 340.80, 470.78 and 303.94 is: 419.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.80 : 470.78 = 303.94 : x
  2. Step 2: Convert to fraction form
    340.80/470.78 = 303.94/x
  3. Step 3: Cross multiply
    340.80x = 470.78 × 303.94
  4. Step 4: Simplify right side
    340.80x = 143,088.87
  5. Step 5: Solve for x
    x = 143,088.87/340.80
  6. Step 6: Final answer
    x = 419.86

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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.