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Finding the Fourth Proportional to 687.36, 948.50 and 376.84

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Solution

The fourth proportional to 687.36, 948.50 and 376.84 is: 520.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.36 : 948.50 = 376.84 : x
  2. Step 2: Convert to fraction form
    687.36/948.50 = 376.84/x
  3. Step 3: Cross multiply
    687.36x = 948.50 × 376.84
  4. Step 4: Simplify right side
    687.36x = 357,432.74
  5. Step 5: Solve for x
    x = 357,432.74/687.36
  6. Step 6: Final answer
    x = 520.01

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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.