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Finding the Fourth Proportional to 826.32, 1,140.12 and 564.24

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Solution

The fourth proportional to 826.32, 1,140.12 and 564.24 is: 778.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.32 : 1,140.12 = 564.24 : x
  2. Step 2: Convert to fraction form
    826.32/1,140.12 = 564.24/x
  3. Step 3: Cross multiply
    826.32x = 1,140.12 × 564.24
  4. Step 4: Simplify right side
    826.32x = 643,301.31
  5. Step 5: Solve for x
    x = 643,301.31/826.32
  6. Step 6: Final answer
    x = 778.51

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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.