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Finding the Fourth Proportional to 295.61, 442.80 and 261.45

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Solution

The fourth proportional to 295.61, 442.80 and 261.45 is: 391.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.61 : 442.80 = 261.45 : x
  2. Step 2: Convert to fraction form
    295.61/442.80 = 261.45/x
  3. Step 3: Cross multiply
    295.61x = 442.80 × 261.45
  4. Step 4: Simplify right side
    295.61x = 115,770.06
  5. Step 5: Solve for x
    x = 115,770.06/295.61
  6. Step 6: Final answer
    x = 391.64

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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.