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Finding the Fourth Proportional to 827.23, 1,139.92 and 590.51

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Solution

The fourth proportional to 827.23, 1,139.92 and 590.51 is: 813.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.23 : 1,139.92 = 590.51 : x
  2. Step 2: Convert to fraction form
    827.23/1,139.92 = 590.51/x
  3. Step 3: Cross multiply
    827.23x = 1,139.92 × 590.51
  4. Step 4: Simplify right side
    827.23x = 673,134.16
  5. Step 5: Solve for x
    x = 673,134.16/827.23
  6. Step 6: Final answer
    x = 813.72

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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.