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Finding the Fourth Proportional to 506.64, 699.15 and 285.61

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Solution

The fourth proportional to 506.64, 699.15 and 285.61 is: 394.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.64 : 699.15 = 285.61 : x
  2. Step 2: Convert to fraction form
    506.64/699.15 = 285.61/x
  3. Step 3: Cross multiply
    506.64x = 699.15 × 285.61
  4. Step 4: Simplify right side
    506.64x = 199,684.23
  5. Step 5: Solve for x
    x = 199,684.23/506.64
  6. Step 6: Final answer
    x = 394.13

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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.