Home / 3,987.07-5,981.89-1,214.28

Finding the Fourth Proportional to 3,987.07, 5,981.89 and 1,214.28

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Solution

The fourth proportional to 3,987.07, 5,981.89 and 1,214.28 is: 1,821.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.07 : 5,981.89 = 1,214.28 : x
  2. Step 2: Convert to fraction form
    3,987.07/5,981.89 = 1,214.28/x
  3. Step 3: Cross multiply
    3,987.07x = 5,981.89 × 1,214.28
  4. Step 4: Simplify right side
    3,987.07x = 7,263,671.40
  5. Step 5: Solve for x
    x = 7,263,671.40/3,987.07
  6. Step 6: Final answer
    x = 1,821.81

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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.