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Finding the Fourth Proportional to 823.57, 1,136.63 and 474.26

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Solution

The fourth proportional to 823.57, 1,136.63 and 474.26 is: 654.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.57 : 1,136.63 = 474.26 : x
  2. Step 2: Convert to fraction form
    823.57/1,136.63 = 474.26/x
  3. Step 3: Cross multiply
    823.57x = 1,136.63 × 474.26
  4. Step 4: Simplify right side
    823.57x = 539,050.09
  5. Step 5: Solve for x
    x = 539,050.09/823.57
  6. Step 6: Final answer
    x = 654.53

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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.