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Finding the Fourth Proportional to 346.41, 478.07 and 288.09

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Solution

The fourth proportional to 346.41, 478.07 and 288.09 is: 397.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.41 : 478.07 = 288.09 : x
  2. Step 2: Convert to fraction form
    346.41/478.07 = 288.09/x
  3. Step 3: Cross multiply
    346.41x = 478.07 × 288.09
  4. Step 4: Simplify right side
    346.41x = 137,725.75
  5. Step 5: Solve for x
    x = 137,725.75/346.41
  6. Step 6: Final answer
    x = 397.58

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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.