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Finding the Fourth Proportional to 824.30, 1,236.01 and 276.30

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Solution

The fourth proportional to 824.30, 1,236.01 and 276.30 is: 414.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.30 : 1,236.01 = 276.30 : x
  2. Step 2: Convert to fraction form
    824.30/1,236.01 = 276.30/x
  3. Step 3: Cross multiply
    824.30x = 1,236.01 × 276.30
  4. Step 4: Simplify right side
    824.30x = 341,509.56
  5. Step 5: Solve for x
    x = 341,509.56/824.30
  6. Step 6: Final answer
    x = 414.30

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1.5x scale

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.