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Finding the Fourth Proportional to 826.83, 1,140.74 and 590.80

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Solution

The fourth proportional to 826.83, 1,140.74 and 590.80 is: 815.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.83 : 1,140.74 = 590.80 : x
  2. Step 2: Convert to fraction form
    826.83/1,140.74 = 590.80/x
  3. Step 3: Cross multiply
    826.83x = 1,140.74 × 590.80
  4. Step 4: Simplify right side
    826.83x = 673,949.19
  5. Step 5: Solve for x
    x = 673,949.19/826.83
  6. Step 6: Final answer
    x = 815.10

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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.