Home / 1,640.10-2,263.37-931.89

Finding the Fourth Proportional to 1,640.10, 2,263.37 and 931.89

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Solution

The fourth proportional to 1,640.10, 2,263.37 and 931.89 is: 1,286.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.10 : 2,263.37 = 931.89 : x
  2. Step 2: Convert to fraction form
    1,640.10/2,263.37 = 931.89/x
  3. Step 3: Cross multiply
    1,640.10x = 2,263.37 × 931.89
  4. Step 4: Simplify right side
    1,640.10x = 2,109,207.21
  5. Step 5: Solve for x
    x = 2,109,207.21/1,640.10
  6. Step 6: Final answer
    x = 1,286.02

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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.