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Finding the Fourth Proportional to 343.40, 514.62 and 266.45

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Solution

The fourth proportional to 343.40, 514.62 and 266.45 is: 399.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.40 : 514.62 = 266.45 : x
  2. Step 2: Convert to fraction form
    343.40/514.62 = 266.45/x
  3. Step 3: Cross multiply
    343.40x = 514.62 × 266.45
  4. Step 4: Simplify right side
    343.40x = 137,117.93
  5. Step 5: Solve for x
    x = 137,117.93/343.40
  6. Step 6: Final answer
    x = 399.30

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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.