Home / 2,140.16-3,210.48-679.28

Finding the Fourth Proportional to 2,140.16, 3,210.48 and 679.28

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Solution

The fourth proportional to 2,140.16, 3,210.48 and 679.28 is: 1,019.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.16 : 3,210.48 = 679.28 : x
  2. Step 2: Convert to fraction form
    2,140.16/3,210.48 = 679.28/x
  3. Step 3: Cross multiply
    2,140.16x = 3,210.48 × 679.28
  4. Step 4: Simplify right side
    2,140.16x = 2,180,814.85
  5. Step 5: Solve for x
    x = 2,180,814.85/2,140.16
  6. Step 6: Final answer
    x = 1,019.00

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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.