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Finding the Fourth Proportional to 346.44, 478.16 and 215.36

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Solution

The fourth proportional to 346.44, 478.16 and 215.36 is: 297.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.44 : 478.16 = 215.36 : x
  2. Step 2: Convert to fraction form
    346.44/478.16 = 215.36/x
  3. Step 3: Cross multiply
    346.44x = 478.16 × 215.36
  4. Step 4: Simplify right side
    346.44x = 102,976.54
  5. Step 5: Solve for x
    x = 102,976.54/346.44
  6. Step 6: Final answer
    x = 297.24

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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.