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Finding the Fourth Proportional to 218.58, 328.02 and 96.93

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Solution

The fourth proportional to 218.58, 328.02 and 96.93 is: 145.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.58 : 328.02 = 96.93 : x
  2. Step 2: Convert to fraction form
    218.58/328.02 = 96.93/x
  3. Step 3: Cross multiply
    218.58x = 328.02 × 96.93
  4. Step 4: Simplify right side
    218.58x = 31,792.85
  5. Step 5: Solve for x
    x = 31,792.85/218.58
  6. Step 6: Final answer
    x = 145.46

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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.