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Finding the Fourth Proportional to 385.83, 532.20 and 245.85

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Solution

The fourth proportional to 385.83, 532.20 and 245.85 is: 339.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.83 : 532.20 = 245.85 : x
  2. Step 2: Convert to fraction form
    385.83/532.20 = 245.85/x
  3. Step 3: Cross multiply
    385.83x = 532.20 × 245.85
  4. Step 4: Simplify right side
    385.83x = 130,841.37
  5. Step 5: Solve for x
    x = 130,841.37/385.83
  6. Step 6: Final answer
    x = 339.12

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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.