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Finding the Fourth Proportional to 826.23, 1,140.21 and 453.24

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Solution

The fourth proportional to 826.23, 1,140.21 and 453.24 is: 625.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.23 : 1,140.21 = 453.24 : x
  2. Step 2: Convert to fraction form
    826.23/1,140.21 = 453.24/x
  3. Step 3: Cross multiply
    826.23x = 1,140.21 × 453.24
  4. Step 4: Simplify right side
    826.23x = 516,788.78
  5. Step 5: Solve for x
    x = 516,788.78/826.23
  6. Step 6: Final answer
    x = 625.48

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1.5x scale

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.