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Finding the Fourth Proportional to 305.52, 458.55 and 279.60

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Solution

The fourth proportional to 305.52, 458.55 and 279.60 is: 419.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.52 : 458.55 = 279.60 : x
  2. Step 2: Convert to fraction form
    305.52/458.55 = 279.60/x
  3. Step 3: Cross multiply
    305.52x = 458.55 × 279.60
  4. Step 4: Simplify right side
    305.52x = 128,210.58
  5. Step 5: Solve for x
    x = 128,210.58/305.52
  6. Step 6: Final answer
    x = 419.65

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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.