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Finding the Fourth Proportional to 521.18, 718.97 and 344.45

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Solution

The fourth proportional to 521.18, 718.97 and 344.45 is: 475.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.18 : 718.97 = 344.45 : x
  2. Step 2: Convert to fraction form
    521.18/718.97 = 344.45/x
  3. Step 3: Cross multiply
    521.18x = 718.97 × 344.45
  4. Step 4: Simplify right side
    521.18x = 247,643.90
  5. Step 5: Solve for x
    x = 247,643.90/521.18
  6. Step 6: Final answer
    x = 475.16

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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.