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Finding the Fourth Proportional to 320.10, 442.04 and 255.08

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Solution

The fourth proportional to 320.10, 442.04 and 255.08 is: 352.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.10 : 442.04 = 255.08 : x
  2. Step 2: Convert to fraction form
    320.10/442.04 = 255.08/x
  3. Step 3: Cross multiply
    320.10x = 442.04 × 255.08
  4. Step 4: Simplify right side
    320.10x = 112,752.08
  5. Step 5: Solve for x
    x = 112,752.08/320.10
  6. Step 6: Final answer
    x = 352.24

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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.