Home / 3,131.03-4,320.81-1,805.15

Finding the Fourth Proportional to 3,131.03, 4,320.81 and 1,805.15

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Solution

The fourth proportional to 3,131.03, 4,320.81 and 1,805.15 is: 2,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.03 : 4,320.81 = 1,805.15 : x
  2. Step 2: Convert to fraction form
    3,131.03/4,320.81 = 1,805.15/x
  3. Step 3: Cross multiply
    3,131.03x = 4,320.81 × 1,805.15
  4. Step 4: Simplify right side
    3,131.03x = 7,799,688.57
  5. Step 5: Solve for x
    x = 7,799,688.57/3,131.03
  6. Step 6: Final answer
    x = 2,491.10

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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.