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Finding the Fourth Proportional to 340.75, 469.84 and 278.38

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Solution

The fourth proportional to 340.75, 469.84 and 278.38 is: 383.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.75 : 469.84 = 278.38 : x
  2. Step 2: Convert to fraction form
    340.75/469.84 = 278.38/x
  3. Step 3: Cross multiply
    340.75x = 469.84 × 278.38
  4. Step 4: Simplify right side
    340.75x = 130,794.06
  5. Step 5: Solve for x
    x = 130,794.06/340.75
  6. Step 6: Final answer
    x = 383.84

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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.