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Finding the Fourth Proportional to 498.96, 689.04 and 494.64

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Solution

The fourth proportional to 498.96, 689.04 and 494.64 is: 683.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.96 : 689.04 = 494.64 : x
  2. Step 2: Convert to fraction form
    498.96/689.04 = 494.64/x
  3. Step 3: Cross multiply
    498.96x = 689.04 × 494.64
  4. Step 4: Simplify right side
    498.96x = 340,826.75
  5. Step 5: Solve for x
    x = 340,826.75/498.96
  6. Step 6: Final answer
    x = 683.07

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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.