Home / 2,140.52-3,210.78-986.12

Finding the Fourth Proportional to 2,140.52, 3,210.78 and 986.12

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Solution

The fourth proportional to 2,140.52, 3,210.78 and 986.12 is: 1,479.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.52 : 3,210.78 = 986.12 : x
  2. Step 2: Convert to fraction form
    2,140.52/3,210.78 = 986.12/x
  3. Step 3: Cross multiply
    2,140.52x = 3,210.78 × 986.12
  4. Step 4: Simplify right side
    2,140.52x = 3,166,214.37
  5. Step 5: Solve for x
    x = 3,166,214.37/2,140.52
  6. Step 6: Final answer
    x = 1,479.18

Related Problems

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Double scale
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Similar ratio
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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.