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Finding the Fourth Proportional to 826.22, 1,140.15 and 453.19

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Solution

The fourth proportional to 826.22, 1,140.15 and 453.19 is: 625.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.22 : 1,140.15 = 453.19 : x
  2. Step 2: Convert to fraction form
    826.22/1,140.15 = 453.19/x
  3. Step 3: Cross multiply
    826.22x = 1,140.15 × 453.19
  4. Step 4: Simplify right side
    826.22x = 516,701.73
  5. Step 5: Solve for x
    x = 516,701.73/826.22
  6. Step 6: Final answer
    x = 625.38

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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.