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Finding the Fourth Proportional to 687.03, 948.08 and 376.53

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Solution

The fourth proportional to 687.03, 948.08 and 376.53 is: 519.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.03 : 948.08 = 376.53 : x
  2. Step 2: Convert to fraction form
    687.03/948.08 = 376.53/x
  3. Step 3: Cross multiply
    687.03x = 948.08 × 376.53
  4. Step 4: Simplify right side
    687.03x = 356,978.68
  5. Step 5: Solve for x
    x = 356,978.68/687.03
  6. Step 6: Final answer
    x = 519.60

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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.