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Finding the Fourth Proportional to 571.09, 787.96 and 384.92

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Solution

The fourth proportional to 571.09, 787.96 and 384.92 is: 531.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.09 : 787.96 = 384.92 : x
  2. Step 2: Convert to fraction form
    571.09/787.96 = 384.92/x
  3. Step 3: Cross multiply
    571.09x = 787.96 × 384.92
  4. Step 4: Simplify right side
    571.09x = 303,301.56
  5. Step 5: Solve for x
    x = 303,301.56/571.09
  6. Step 6: Final answer
    x = 531.09

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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.