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Finding the Fourth Proportional to 346.50, 478.44 and 268.74

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Solution

The fourth proportional to 346.50, 478.44 and 268.74 is: 371.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.50 : 478.44 = 268.74 : x
  2. Step 2: Convert to fraction form
    346.50/478.44 = 268.74/x
  3. Step 3: Cross multiply
    346.50x = 478.44 × 268.74
  4. Step 4: Simplify right side
    346.50x = 128,575.97
  5. Step 5: Solve for x
    x = 128,575.97/346.50
  6. Step 6: Final answer
    x = 371.07

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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.