Home / 3,515.12-5,272.68-918.28

Finding the Fourth Proportional to 3,515.12, 5,272.68 and 918.28

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Solution

The fourth proportional to 3,515.12, 5,272.68 and 918.28 is: 1,377.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,515.12 : 5,272.68 = 918.28 : x
  2. Step 2: Convert to fraction form
    3,515.12/5,272.68 = 918.28/x
  3. Step 3: Cross multiply
    3,515.12x = 5,272.68 × 918.28
  4. Step 4: Simplify right side
    3,515.12x = 4,841,796.59
  5. Step 5: Solve for x
    x = 4,841,796.59/3,515.12
  6. Step 6: Final answer
    x = 1,377.42

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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.