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Finding the Fourth Proportional to 823.04, 1,133.86 and 573.90

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Solution

The fourth proportional to 823.04, 1,133.86 and 573.90 is: 790.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.04 : 1,133.86 = 573.90 : x
  2. Step 2: Convert to fraction form
    823.04/1,133.86 = 573.90/x
  3. Step 3: Cross multiply
    823.04x = 1,133.86 × 573.90
  4. Step 4: Simplify right side
    823.04x = 650,722.25
  5. Step 5: Solve for x
    x = 650,722.25/823.04
  6. Step 6: Final answer
    x = 790.63

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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.