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Finding the Fourth Proportional to 498.71, 688.23 and 277.68

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Solution

The fourth proportional to 498.71, 688.23 and 277.68 is: 383.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.71 : 688.23 = 277.68 : x
  2. Step 2: Convert to fraction form
    498.71/688.23 = 277.68/x
  3. Step 3: Cross multiply
    498.71x = 688.23 × 277.68
  4. Step 4: Simplify right side
    498.71x = 191,107.71
  5. Step 5: Solve for x
    x = 191,107.71/498.71
  6. Step 6: Final answer
    x = 383.20

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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.