Home / 3,145.61-4,340.85-1,819.55

Finding the Fourth Proportional to 3,145.61, 4,340.85 and 1,819.55

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Solution

The fourth proportional to 3,145.61, 4,340.85 and 1,819.55 is: 2,510.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.61 : 4,340.85 = 1,819.55 : x
  2. Step 2: Convert to fraction form
    3,145.61/4,340.85 = 1,819.55/x
  3. Step 3: Cross multiply
    3,145.61x = 4,340.85 × 1,819.55
  4. Step 4: Simplify right side
    3,145.61x = 7,898,393.62
  5. Step 5: Solve for x
    x = 7,898,393.62/3,145.61
  6. Step 6: Final answer
    x = 2,510.93

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Half scale
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Double 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.