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Finding the Fourth Proportional to 695.13, 959.28 and 380.40

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Solution

The fourth proportional to 695.13, 959.28 and 380.40 is: 524.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.13 : 959.28 = 380.40 : x
  2. Step 2: Convert to fraction form
    695.13/959.28 = 380.40/x
  3. Step 3: Cross multiply
    695.13x = 959.28 × 380.40
  4. Step 4: Simplify right side
    695.13x = 364,903.41
  5. Step 5: Solve for x
    x = 364,903.41/695.13
  6. Step 6: Final answer
    x = 524.95

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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.