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Finding the Fourth Proportional to 823.32, 1,136.37 and 474.21

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Solution

The fourth proportional to 823.32, 1,136.37 and 474.21 is: 654.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.32 : 1,136.37 = 474.21 : x
  2. Step 2: Convert to fraction form
    823.32/1,136.37 = 474.21/x
  3. Step 3: Cross multiply
    823.32x = 1,136.37 × 474.21
  4. Step 4: Simplify right side
    823.32x = 538,878.02
  5. Step 5: Solve for x
    x = 538,878.02/823.32
  6. Step 6: Final answer
    x = 654.52

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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.