Home / 3,089.25-4,633.90-780.75

Finding the Fourth Proportional to 3,089.25, 4,633.90 and 780.75

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Solution

The fourth proportional to 3,089.25, 4,633.90 and 780.75 is: 1,171.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,089.25 : 4,633.90 = 780.75 : x
  2. Step 2: Convert to fraction form
    3,089.25/4,633.90 = 780.75/x
  3. Step 3: Cross multiply
    3,089.25x = 4,633.90 × 780.75
  4. Step 4: Simplify right side
    3,089.25x = 3,617,915.47
  5. Step 5: Solve for x
    x = 3,617,915.47/3,089.25
  6. Step 6: Final answer
    x = 1,171.13

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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.