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Finding the Fourth Proportional to 346.78, 478.50 and 191.50

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Solution

The fourth proportional to 346.78, 478.50 and 191.50 is: 264.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.78 : 478.50 = 191.50 : x
  2. Step 2: Convert to fraction form
    346.78/478.50 = 191.50/x
  3. Step 3: Cross multiply
    346.78x = 478.50 × 191.50
  4. Step 4: Simplify right side
    346.78x = 91,632.75
  5. Step 5: Solve for x
    x = 91,632.75/346.78
  6. Step 6: Final answer
    x = 264.24

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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.