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Finding the Fourth Proportional to 298.60, 448.28 and 286

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Solution

The fourth proportional to 298.60, 448.28 and 286 is: 429.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.60 : 448.28 = 286 : x
  2. Step 2: Convert to fraction form
    298.60/448.28 = 286/x
  3. Step 3: Cross multiply
    298.60x = 448.28 × 286
  4. Step 4: Simplify right side
    298.60x = 128,208.08
  5. Step 5: Solve for x
    x = 128,208.08/298.60
  6. Step 6: Final answer
    x = 429.36

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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.