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Finding the Fourth Proportional to 395.92, 594.72 and 385.12

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Solution

The fourth proportional to 395.92, 594.72 and 385.12 is: 578.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.92 : 594.72 = 385.12 : x
  2. Step 2: Convert to fraction form
    395.92/594.72 = 385.12/x
  3. Step 3: Cross multiply
    395.92x = 594.72 × 385.12
  4. Step 4: Simplify right side
    395.92x = 229,038.57
  5. Step 5: Solve for x
    x = 229,038.57/395.92
  6. Step 6: Final answer
    x = 578.50

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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.