Home / 2,140.42-3,210.66-986.20

Finding the Fourth Proportional to 2,140.42, 3,210.66 and 986.20

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Solution

The fourth proportional to 2,140.42, 3,210.66 and 986.20 is: 1,479.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.42 : 3,210.66 = 986.20 : x
  2. Step 2: Convert to fraction form
    2,140.42/3,210.66 = 986.20/x
  3. Step 3: Cross multiply
    2,140.42x = 3,210.66 × 986.20
  4. Step 4: Simplify right side
    2,140.42x = 3,166,352.89
  5. Step 5: Solve for x
    x = 3,166,352.89/2,140.42
  6. Step 6: Final answer
    x = 1,479.31

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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.