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Finding the Fourth Proportional to 303.40, 455.24 and 291.12

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Solution

The fourth proportional to 303.40, 455.24 and 291.12 is: 436.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.40 : 455.24 = 291.12 : x
  2. Step 2: Convert to fraction form
    303.40/455.24 = 291.12/x
  3. Step 3: Cross multiply
    303.40x = 455.24 × 291.12
  4. Step 4: Simplify right side
    303.40x = 132,529.47
  5. Step 5: Solve for x
    x = 132,529.47/303.40
  6. Step 6: Final answer
    x = 436.81

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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.