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Finding the Fourth Proportional to 508.65, 701.85 and 287.55

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Solution

The fourth proportional to 508.65, 701.85 and 287.55 is: 396.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.65 : 701.85 = 287.55 : x
  2. Step 2: Convert to fraction form
    508.65/701.85 = 287.55/x
  3. Step 3: Cross multiply
    508.65x = 701.85 × 287.55
  4. Step 4: Simplify right side
    508.65x = 201,816.97
  5. Step 5: Solve for x
    x = 201,816.97/508.65
  6. Step 6: Final answer
    x = 396.77

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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.