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Finding the Fourth Proportional to 879.76, 1,320 and 295

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Solution

The fourth proportional to 879.76, 1,320 and 295 is: 442.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.76 : 1,320 = 295 : x
  2. Step 2: Convert to fraction form
    879.76/1,320 = 295/x
  3. Step 3: Cross multiply
    879.76x = 1,320 × 295
  4. Step 4: Simplify right side
    879.76x = 389,400
  5. Step 5: Solve for x
    x = 389,400/879.76
  6. Step 6: Final answer
    x = 442.62

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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.