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Finding the Fourth Proportional to 925.99, 1,388.99 and 276.67

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Solution

The fourth proportional to 925.99, 1,388.99 and 276.67 is: 415.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.99 : 1,388.99 = 276.67 : x
  2. Step 2: Convert to fraction form
    925.99/1,388.99 = 276.67/x
  3. Step 3: Cross multiply
    925.99x = 1,388.99 × 276.67
  4. Step 4: Simplify right side
    925.99x = 384,291.86
  5. Step 5: Solve for x
    x = 384,291.86/925.99
  6. Step 6: Final answer
    x = 415.01

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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.