Home / 1,640.43-2,263.60-977.15

Finding the Fourth Proportional to 1,640.43, 2,263.60 and 977.15

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Solution

The fourth proportional to 1,640.43, 2,263.60 and 977.15 is: 1,348.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.43 : 2,263.60 = 977.15 : x
  2. Step 2: Convert to fraction form
    1,640.43/2,263.60 = 977.15/x
  3. Step 3: Cross multiply
    1,640.43x = 2,263.60 × 977.15
  4. Step 4: Simplify right side
    1,640.43x = 2,211,879.96
  5. Step 5: Solve for x
    x = 2,211,879.96/1,640.43
  6. Step 6: Final answer
    x = 1,348.35

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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.