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Finding the Fourth Proportional to 498.21, 687.54 and 277.17

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Solution

The fourth proportional to 498.21, 687.54 and 277.17 is: 382.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.21 : 687.54 = 277.17 : x
  2. Step 2: Convert to fraction form
    498.21/687.54 = 277.17/x
  3. Step 3: Cross multiply
    498.21x = 687.54 × 277.17
  4. Step 4: Simplify right side
    498.21x = 190,565.46
  5. Step 5: Solve for x
    x = 190,565.46/498.21
  6. Step 6: Final answer
    x = 382.50

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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.