Home / 2,381.09-3,285.63-1,318.87

Finding the Fourth Proportional to 2,381.09, 3,285.63 and 1,318.87

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Solution

The fourth proportional to 2,381.09, 3,285.63 and 1,318.87 is: 1,819.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.09 : 3,285.63 = 1,318.87 : x
  2. Step 2: Convert to fraction form
    2,381.09/3,285.63 = 1,318.87/x
  3. Step 3: Cross multiply
    2,381.09x = 3,285.63 × 1,318.87
  4. Step 4: Simplify right side
    2,381.09x = 4,333,322.95
  5. Step 5: Solve for x
    x = 4,333,322.95/2,381.09
  6. Step 6: Final answer
    x = 1,819.89

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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.