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Finding the Fourth Proportional to 3,099.80, 4,649.70 and 1,803.80

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Solution

The fourth proportional to 3,099.80, 4,649.70 and 1,803.80 is: 2,705.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,099.80 : 4,649.70 = 1,803.80 : x
  2. Step 2: Convert to fraction form
    3,099.80/4,649.70 = 1,803.80/x
  3. Step 3: Cross multiply
    3,099.80x = 4,649.70 × 1,803.80
  4. Step 4: Simplify right side
    3,099.80x = 8,387,128.86
  5. Step 5: Solve for x
    x = 8,387,128.86/3,099.80
  6. Step 6: Final answer
    x = 2,705.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.