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Finding the Fourth Proportional to 824.04, 1,235.86 and 385.01

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Solution

The fourth proportional to 824.04, 1,235.86 and 385.01 is: 577.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.04 : 1,235.86 = 385.01 : x
  2. Step 2: Convert to fraction form
    824.04/1,235.86 = 385.01/x
  3. Step 3: Cross multiply
    824.04x = 1,235.86 × 385.01
  4. Step 4: Simplify right side
    824.04x = 475,818.46
  5. Step 5: Solve for x
    x = 475,818.46/824.04
  6. Step 6: Final answer
    x = 577.42

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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.