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Finding the Fourth Proportional to 473.30, 653.16 and 286.79

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Solution

The fourth proportional to 473.30, 653.16 and 286.79 is: 395.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.30 : 653.16 = 286.79 : x
  2. Step 2: Convert to fraction form
    473.30/653.16 = 286.79/x
  3. Step 3: Cross multiply
    473.30x = 653.16 × 286.79
  4. Step 4: Simplify right side
    473.30x = 187,321.39
  5. Step 5: Solve for x
    x = 187,321.39/473.30
  6. Step 6: Final answer
    x = 395.78

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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.