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Finding the Fourth Proportional to 2,318.68, 3,477.86 and 857.68

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Solution

The fourth proportional to 2,318.68, 3,477.86 and 857.68 is: 1,286.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,318.68 : 3,477.86 = 857.68 : x
  2. Step 2: Convert to fraction form
    2,318.68/3,477.86 = 857.68/x
  3. Step 3: Cross multiply
    2,318.68x = 3,477.86 × 857.68
  4. Step 4: Simplify right side
    2,318.68x = 2,982,890.96
  5. Step 5: Solve for x
    x = 2,982,890.96/2,318.68
  6. Step 6: Final answer
    x = 1,286.46

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1.5x scale

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.