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Finding the Fourth Proportional to 340.36, 469.88 and 216.15

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Solution

The fourth proportional to 340.36, 469.88 and 216.15 is: 298.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.36 : 469.88 = 216.15 : x
  2. Step 2: Convert to fraction form
    340.36/469.88 = 216.15/x
  3. Step 3: Cross multiply
    340.36x = 469.88 × 216.15
  4. Step 4: Simplify right side
    340.36x = 101,564.56
  5. Step 5: Solve for x
    x = 101,564.56/340.36
  6. Step 6: Final answer
    x = 298.40

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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.