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Finding the Fourth Proportional to 822.39, 1,232.59 and 474.99

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Solution

The fourth proportional to 822.39, 1,232.59 and 474.99 is: 711.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.39 : 1,232.59 = 474.99 : x
  2. Step 2: Convert to fraction form
    822.39/1,232.59 = 474.99/x
  3. Step 3: Cross multiply
    822.39x = 1,232.59 × 474.99
  4. Step 4: Simplify right side
    822.39x = 585,467.92
  5. Step 5: Solve for x
    x = 585,467.92/822.39
  6. Step 6: Final answer
    x = 711.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.