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Finding the Fourth Proportional to 346.88, 478.69 and 208.88

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Solution

The fourth proportional to 346.88, 478.69 and 208.88 is: 288.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.88 : 478.69 = 208.88 : x
  2. Step 2: Convert to fraction form
    346.88/478.69 = 208.88/x
  3. Step 3: Cross multiply
    346.88x = 478.69 × 208.88
  4. Step 4: Simplify right side
    346.88x = 99,985.85
  5. Step 5: Solve for x
    x = 99,985.85/346.88
  6. Step 6: Final answer
    x = 288.25

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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.