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Finding the Fourth Proportional to 521.69, 719.43 and 344.57

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Solution

The fourth proportional to 521.69, 719.43 and 344.57 is: 475.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.69 : 719.43 = 344.57 : x
  2. Step 2: Convert to fraction form
    521.69/719.43 = 344.57/x
  3. Step 3: Cross multiply
    521.69x = 719.43 × 344.57
  4. Step 4: Simplify right side
    521.69x = 247,895.09
  5. Step 5: Solve for x
    x = 247,895.09/521.69
  6. Step 6: Final answer
    x = 475.18

Related Problems

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Double scale
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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.