Home / 3,320.36-4,981.08-1,129.40

Finding the Fourth Proportional to 3,320.36, 4,981.08 and 1,129.40

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Solution

The fourth proportional to 3,320.36, 4,981.08 and 1,129.40 is: 1,694.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.36 : 4,981.08 = 1,129.40 : x
  2. Step 2: Convert to fraction form
    3,320.36/4,981.08 = 1,129.40/x
  3. Step 3: Cross multiply
    3,320.36x = 4,981.08 × 1,129.40
  4. Step 4: Simplify right side
    3,320.36x = 5,625,631.75
  5. Step 5: Solve for x
    x = 5,625,631.75/3,320.36
  6. Step 6: Final answer
    x = 1,694.28

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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.