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Finding the Fourth Proportional to 303.19, 417.90 and 291.85

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Solution

The fourth proportional to 303.19, 417.90 and 291.85 is: 402.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.19 : 417.90 = 291.85 : x
  2. Step 2: Convert to fraction form
    303.19/417.90 = 291.85/x
  3. Step 3: Cross multiply
    303.19x = 417.90 × 291.85
  4. Step 4: Simplify right side
    303.19x = 121,964.12
  5. Step 5: Solve for x
    x = 121,964.12/303.19
  6. Step 6: Final answer
    x = 402.27

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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.