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Finding the Fourth Proportional to 346.41, 478.08 and 215.42

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Solution

The fourth proportional to 346.41, 478.08 and 215.42 is: 297.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.41 : 478.08 = 215.42 : x
  2. Step 2: Convert to fraction form
    346.41/478.08 = 215.42/x
  3. Step 3: Cross multiply
    346.41x = 478.08 × 215.42
  4. Step 4: Simplify right side
    346.41x = 102,985.60
  5. Step 5: Solve for x
    x = 102,985.60/346.41
  6. Step 6: Final answer
    x = 297.29

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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.