Home / 2,990.10-4,126.30-1,645.68

Finding the Fourth Proportional to 2,990.10, 4,126.30 and 1,645.68

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Solution

The fourth proportional to 2,990.10, 4,126.30 and 1,645.68 is: 2,271.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.10 : 4,126.30 = 1,645.68 : x
  2. Step 2: Convert to fraction form
    2,990.10/4,126.30 = 1,645.68/x
  3. Step 3: Cross multiply
    2,990.10x = 4,126.30 × 1,645.68
  4. Step 4: Simplify right side
    2,990.10x = 6,790,569.38
  5. Step 5: Solve for x
    x = 6,790,569.38/2,990.10
  6. Step 6: Final answer
    x = 2,271.02

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Half scale
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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.