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Finding the Fourth Proportional to 346.48, 518.86 and 216.40

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Solution

The fourth proportional to 346.48, 518.86 and 216.40 is: 324.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.48 : 518.86 = 216.40 : x
  2. Step 2: Convert to fraction form
    346.48/518.86 = 216.40/x
  3. Step 3: Cross multiply
    346.48x = 518.86 × 216.40
  4. Step 4: Simplify right side
    346.48x = 112,281.30
  5. Step 5: Solve for x
    x = 112,281.30/346.48
  6. Step 6: Final answer
    x = 324.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.