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Finding the Fourth Proportional to 343.95, 514.98 and 221.91

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Solution

The fourth proportional to 343.95, 514.98 and 221.91 is: 332.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.95 : 514.98 = 221.91 : x
  2. Step 2: Convert to fraction form
    343.95/514.98 = 221.91/x
  3. Step 3: Cross multiply
    343.95x = 514.98 × 221.91
  4. Step 4: Simplify right side
    343.95x = 114,279.21
  5. Step 5: Solve for x
    x = 114,279.21/343.95
  6. Step 6: Final answer
    x = 332.26

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