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Finding the Fourth Proportional to 1,148.28, 1,722.04 and 455.12

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Solution

The fourth proportional to 1,148.28, 1,722.04 and 455.12 is: 682.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.28 : 1,722.04 = 455.12 : x
  2. Step 2: Convert to fraction form
    1,148.28/1,722.04 = 455.12/x
  3. Step 3: Cross multiply
    1,148.28x = 1,722.04 × 455.12
  4. Step 4: Simplify right side
    1,148.28x = 783,734.84
  5. Step 5: Solve for x
    x = 783,734.84/1,148.28
  6. Step 6: Final answer
    x = 682.53

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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.