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Finding the Fourth Proportional to 498.08, 746.64 and 289.64

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Solution

The fourth proportional to 498.08, 746.64 and 289.64 is: 434.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.08 : 746.64 = 289.64 : x
  2. Step 2: Convert to fraction form
    498.08/746.64 = 289.64/x
  3. Step 3: Cross multiply
    498.08x = 746.64 × 289.64
  4. Step 4: Simplify right side
    498.08x = 216,253.08
  5. Step 5: Solve for x
    x = 216,253.08/498.08
  6. Step 6: Final answer
    x = 434.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.