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Finding the Fourth Proportional to 303.77, 455.66 and 279.47

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Solution

The fourth proportional to 303.77, 455.66 and 279.47 is: 419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.77 : 455.66 = 279.47 : x
  2. Step 2: Convert to fraction form
    303.77/455.66 = 279.47/x
  3. Step 3: Cross multiply
    303.77x = 455.66 × 279.47
  4. Step 4: Simplify right side
    303.77x = 127,339.62
  5. Step 5: Solve for x
    x = 127,339.62/303.77
  6. Step 6: Final answer
    x = 419.20

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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.