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Finding the Fourth Proportional to 687.19, 948.32 and 372.46

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Solution

The fourth proportional to 687.19, 948.32 and 372.46 is: 513.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.19 : 948.32 = 372.46 : x
  2. Step 2: Convert to fraction form
    687.19/948.32 = 372.46/x
  3. Step 3: Cross multiply
    687.19x = 948.32 × 372.46
  4. Step 4: Simplify right side
    687.19x = 353,211.27
  5. Step 5: Solve for x
    x = 353,211.27/687.19
  6. Step 6: Final answer
    x = 513.99

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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.