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Finding the Fourth Proportional to 293.48, 404.70 and 289.16

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Solution

The fourth proportional to 293.48, 404.70 and 289.16 is: 398.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.48 : 404.70 = 289.16 : x
  2. Step 2: Convert to fraction form
    293.48/404.70 = 289.16/x
  3. Step 3: Cross multiply
    293.48x = 404.70 × 289.16
  4. Step 4: Simplify right side
    293.48x = 117,023.05
  5. Step 5: Solve for x
    x = 117,023.05/293.48
  6. Step 6: Final answer
    x = 398.74

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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.