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Finding the Fourth Proportional to 303.60, 455.58 and 279.48

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Solution

The fourth proportional to 303.60, 455.58 and 279.48 is: 419.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.60 : 455.58 = 279.48 : x
  2. Step 2: Convert to fraction form
    303.60/455.58 = 279.48/x
  3. Step 3: Cross multiply
    303.60x = 455.58 × 279.48
  4. Step 4: Simplify right side
    303.60x = 127,325.50
  5. Step 5: Solve for x
    x = 127,325.50/303.60
  6. Step 6: Final answer
    x = 419.39

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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.