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Finding the Fourth Proportional to 653.08, 978.78 and 344.92

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Solution

The fourth proportional to 653.08, 978.78 and 344.92 is: 516.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.08 : 978.78 = 344.92 : x
  2. Step 2: Convert to fraction form
    653.08/978.78 = 344.92/x
  3. Step 3: Cross multiply
    653.08x = 978.78 × 344.92
  4. Step 4: Simplify right side
    653.08x = 337,600.80
  5. Step 5: Solve for x
    x = 337,600.80/653.08
  6. Step 6: Final answer
    x = 516.94

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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.