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Finding the Fourth Proportional to 695.81, 960.21 and 381.08

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Solution

The fourth proportional to 695.81, 960.21 and 381.08 is: 525.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.81 : 960.21 = 381.08 : x
  2. Step 2: Convert to fraction form
    695.81/960.21 = 381.08/x
  3. Step 3: Cross multiply
    695.81x = 960.21 × 381.08
  4. Step 4: Simplify right side
    695.81x = 365,916.83
  5. Step 5: Solve for x
    x = 365,916.83/695.81
  6. Step 6: Final answer
    x = 525.89

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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.