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Finding the Fourth Proportional to 346.11, 521.51 and 286.57

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Solution

The fourth proportional to 346.11, 521.51 and 286.57 is: 431.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.11 : 521.51 = 286.57 : x
  2. Step 2: Convert to fraction form
    346.11/521.51 = 286.57/x
  3. Step 3: Cross multiply
    346.11x = 521.51 × 286.57
  4. Step 4: Simplify right side
    346.11x = 149,447.69
  5. Step 5: Solve for x
    x = 149,447.69/346.11
  6. Step 6: Final answer
    x = 431.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.