Home / 4,747.40-7,120.82-1,284.38

Finding the Fourth Proportional to 4,747.40, 7,120.82 and 1,284.38

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Solution

The fourth proportional to 4,747.40, 7,120.82 and 1,284.38 is: 1,926.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,747.40 : 7,120.82 = 1,284.38 : x
  2. Step 2: Convert to fraction form
    4,747.40/7,120.82 = 1,284.38/x
  3. Step 3: Cross multiply
    4,747.40x = 7,120.82 × 1,284.38
  4. Step 4: Simplify right side
    4,747.40x = 9,145,806.40
  5. Step 5: Solve for x
    x = 9,145,806.40/4,747.40
  6. Step 6: Final answer
    x = 1,926.49

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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.