Home / 1,640.12-2,263.23-976.85

Finding the Fourth Proportional to 1,640.12, 2,263.23 and 976.85

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Solution

The fourth proportional to 1,640.12, 2,263.23 and 976.85 is: 1,347.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.12 : 2,263.23 = 976.85 : x
  2. Step 2: Convert to fraction form
    1,640.12/2,263.23 = 976.85/x
  3. Step 3: Cross multiply
    1,640.12x = 2,263.23 × 976.85
  4. Step 4: Simplify right side
    1,640.12x = 2,210,824.91
  5. Step 5: Solve for x
    x = 2,210,824.91/1,640.12
  6. Step 6: Final answer
    x = 1,347.97

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1.5x scale

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.