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Finding the Fourth Proportional to 215.69, 322.93 and 198.68

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Solution

The fourth proportional to 215.69, 322.93 and 198.68 is: 297.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.69 : 322.93 = 198.68 : x
  2. Step 2: Convert to fraction form
    215.69/322.93 = 198.68/x
  3. Step 3: Cross multiply
    215.69x = 322.93 × 198.68
  4. Step 4: Simplify right side
    215.69x = 64,158.74
  5. Step 5: Solve for x
    x = 64,158.74/215.69
  6. Step 6: Final answer
    x = 297.46

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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.