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Finding the Fourth Proportional to 442.66, 611.31 and 287.50

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Solution

The fourth proportional to 442.66, 611.31 and 287.50 is: 397.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.66 : 611.31 = 287.50 : x
  2. Step 2: Convert to fraction form
    442.66/611.31 = 287.50/x
  3. Step 3: Cross multiply
    442.66x = 611.31 × 287.50
  4. Step 4: Simplify right side
    442.66x = 175,751.63
  5. Step 5: Solve for x
    x = 175,751.63/442.66
  6. Step 6: Final answer
    x = 397.04

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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.