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Finding the Fourth Proportional to 302.28, 417.26 and 261

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Solution

The fourth proportional to 302.28, 417.26 and 261 is: 360.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.28 : 417.26 = 261 : x
  2. Step 2: Convert to fraction form
    302.28/417.26 = 261/x
  3. Step 3: Cross multiply
    302.28x = 417.26 × 261
  4. Step 4: Simplify right side
    302.28x = 108,904.86
  5. Step 5: Solve for x
    x = 108,904.86/302.28
  6. Step 6: Final answer
    x = 360.28

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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.