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Finding the Fourth Proportional to 286.56, 432.90 and 283.86

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Solution

The fourth proportional to 286.56, 432.90 and 283.86 is: 428.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.56 : 432.90 = 283.86 : x
  2. Step 2: Convert to fraction form
    286.56/432.90 = 283.86/x
  3. Step 3: Cross multiply
    286.56x = 432.90 × 283.86
  4. Step 4: Simplify right side
    286.56x = 122,882.99
  5. Step 5: Solve for x
    x = 122,882.99/286.56
  6. Step 6: Final answer
    x = 428.82

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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.