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Finding the Fourth Proportional to 346.88, 478.80 and 243.68

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Solution

The fourth proportional to 346.88, 478.80 and 243.68 is: 336.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.88 : 478.80 = 243.68 : x
  2. Step 2: Convert to fraction form
    346.88/478.80 = 243.68/x
  3. Step 3: Cross multiply
    346.88x = 478.80 × 243.68
  4. Step 4: Simplify right side
    346.88x = 116,673.98
  5. Step 5: Solve for x
    x = 116,673.98/346.88
  6. Step 6: Final answer
    x = 336.35

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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.