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Finding the Fourth Proportional to 298.87, 448.69 and 285.02

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Solution

The fourth proportional to 298.87, 448.69 and 285.02 is: 427.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.87 : 448.69 = 285.02 : x
  2. Step 2: Convert to fraction form
    298.87/448.69 = 285.02/x
  3. Step 3: Cross multiply
    298.87x = 448.69 × 285.02
  4. Step 4: Simplify right side
    298.87x = 127,886.24
  5. Step 5: Solve for x
    x = 127,886.24/298.87
  6. Step 6: Final answer
    x = 427.90

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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.