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Finding the Fourth Proportional to 826.32, 1,140.34 and 453.34

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Solution

The fourth proportional to 826.32, 1,140.34 and 453.34 is: 625.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.32 : 1,140.34 = 453.34 : x
  2. Step 2: Convert to fraction form
    826.32/1,140.34 = 453.34/x
  3. Step 3: Cross multiply
    826.32x = 1,140.34 × 453.34
  4. Step 4: Simplify right side
    826.32x = 516,961.74
  5. Step 5: Solve for x
    x = 516,961.74/826.32
  6. Step 6: Final answer
    x = 625.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.