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Finding the Fourth Proportional to 384.30, 580.55 and 382.86

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Solution

The fourth proportional to 384.30, 580.55 and 382.86 is: 578.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.30 : 580.55 = 382.86 : x
  2. Step 2: Convert to fraction form
    384.30/580.55 = 382.86/x
  3. Step 3: Cross multiply
    384.30x = 580.55 × 382.86
  4. Step 4: Simplify right side
    384.30x = 222,267.46
  5. Step 5: Solve for x
    x = 222,267.46/384.30
  6. Step 6: Final answer
    x = 578.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.