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Finding the Fourth Proportional to 1,395.96, 1,935.37 and 1,318.20

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Solution

The fourth proportional to 1,395.96, 1,935.37 and 1,318.20 is: 1,827.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.96 : 1,935.37 = 1,318.20 : x
  2. Step 2: Convert to fraction form
    1,395.96/1,935.37 = 1,318.20/x
  3. Step 3: Cross multiply
    1,395.96x = 1,935.37 × 1,318.20
  4. Step 4: Simplify right side
    1,395.96x = 2,551,204.73
  5. Step 5: Solve for x
    x = 2,551,204.73/1,395.96
  6. Step 6: Final answer
    x = 1,827.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.