Home / 2,043.80-3,065.70-811.13

Finding the Fourth Proportional to 2,043.80, 3,065.70 and 811.13

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Solution

The fourth proportional to 2,043.80, 3,065.70 and 811.13 is: 1,216.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,043.80 : 3,065.70 = 811.13 : x
  2. Step 2: Convert to fraction form
    2,043.80/3,065.70 = 811.13/x
  3. Step 3: Cross multiply
    2,043.80x = 3,065.70 × 811.13
  4. Step 4: Simplify right side
    2,043.80x = 2,486,681.64
  5. Step 5: Solve for x
    x = 2,486,681.64/2,043.80
  6. Step 6: Final answer
    x = 1,216.70

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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.