Home / 1,640.55-2,263.72-977.39

Finding the Fourth Proportional to 1,640.55, 2,263.72 and 977.39

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Solution

The fourth proportional to 1,640.55, 2,263.72 and 977.39 is: 1,348.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.55 : 2,263.72 = 977.39 : x
  2. Step 2: Convert to fraction form
    1,640.55/2,263.72 = 977.39/x
  3. Step 3: Cross multiply
    1,640.55x = 2,263.72 × 977.39
  4. Step 4: Simplify right side
    1,640.55x = 2,212,537.29
  5. Step 5: Solve for x
    x = 2,212,537.29/1,640.55
  6. Step 6: Final answer
    x = 1,348.66

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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.