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Finding the Fourth Proportional to 2,180.40, 3,061.20 and 2,180.40

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Solution

The fourth proportional to 2,180.40, 3,061.20 and 2,180.40 is: 3,061.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,180.40 : 3,061.20 = 2,180.40 : x
  2. Step 2: Convert to fraction form
    2,180.40/3,061.20 = 2,180.40/x
  3. Step 3: Cross multiply
    2,180.40x = 3,061.20 × 2,180.40
  4. Step 4: Simplify right side
    2,180.40x = 6,674,640.48
  5. Step 5: Solve for x
    x = 6,674,640.48/2,180.40
  6. Step 6: Final answer
    x = 3,061.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.