Home / 2,428.12-3,642.24-784.84

Finding the Fourth Proportional to 2,428.12, 3,642.24 and 784.84

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Solution

The fourth proportional to 2,428.12, 3,642.24 and 784.84 is: 1,177.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,428.12 : 3,642.24 = 784.84 : x
  2. Step 2: Convert to fraction form
    2,428.12/3,642.24 = 784.84/x
  3. Step 3: Cross multiply
    2,428.12x = 3,642.24 × 784.84
  4. Step 4: Simplify right side
    2,428.12x = 2,858,575.64
  5. Step 5: Solve for x
    x = 2,858,575.64/2,428.12
  6. Step 6: Final answer
    x = 1,177.28

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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.