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Finding the Fourth Proportional to 695.39, 959.63 and 380.64

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Solution

The fourth proportional to 695.39, 959.63 and 380.64 is: 525.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.39 : 959.63 = 380.64 : x
  2. Step 2: Convert to fraction form
    695.39/959.63 = 380.64/x
  3. Step 3: Cross multiply
    695.39x = 959.63 × 380.64
  4. Step 4: Simplify right side
    695.39x = 365,271.66
  5. Step 5: Solve for x
    x = 365,271.66/695.39
  6. Step 6: Final answer
    x = 525.28

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1.5x scale

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.