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Finding the Fourth Proportional to 823.77, 1,235.25 and 384.92

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Solution

The fourth proportional to 823.77, 1,235.25 and 384.92 is: 577.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.77 : 1,235.25 = 384.92 : x
  2. Step 2: Convert to fraction form
    823.77/1,235.25 = 384.92/x
  3. Step 3: Cross multiply
    823.77x = 1,235.25 × 384.92
  4. Step 4: Simplify right side
    823.77x = 475,472.43
  5. Step 5: Solve for x
    x = 475,472.43/823.77
  6. Step 6: Final answer
    x = 577.19

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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.