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Finding the Fourth Proportional to 302.80, 417.62 and 186.26

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Solution

The fourth proportional to 302.80, 417.62 and 186.26 is: 256.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.80 : 417.62 = 186.26 : x
  2. Step 2: Convert to fraction form
    302.80/417.62 = 186.26/x
  3. Step 3: Cross multiply
    302.80x = 417.62 × 186.26
  4. Step 4: Simplify right side
    302.80x = 77,785.90
  5. Step 5: Solve for x
    x = 77,785.90/302.80
  6. Step 6: Final answer
    x = 256.89

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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.