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Finding the Fourth Proportional to 823.09, 1,135.81 and 473.75

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Solution

The fourth proportional to 823.09, 1,135.81 and 473.75 is: 653.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.09 : 1,135.81 = 473.75 : x
  2. Step 2: Convert to fraction form
    823.09/1,135.81 = 473.75/x
  3. Step 3: Cross multiply
    823.09x = 1,135.81 × 473.75
  4. Step 4: Simplify right side
    823.09x = 538,089.99
  5. Step 5: Solve for x
    x = 538,089.99/823.09
  6. Step 6: Final answer
    x = 653.74

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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.