Home / 2,160.20-2,981.58-1,276.40

Finding the Fourth Proportional to 2,160.20, 2,981.58 and 1,276.40

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Solution

The fourth proportional to 2,160.20, 2,981.58 and 1,276.40 is: 1,761.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.20 : 2,981.58 = 1,276.40 : x
  2. Step 2: Convert to fraction form
    2,160.20/2,981.58 = 1,276.40/x
  3. Step 3: Cross multiply
    2,160.20x = 2,981.58 × 1,276.40
  4. Step 4: Simplify right side
    2,160.20x = 3,805,688.71
  5. Step 5: Solve for x
    x = 3,805,688.71/2,160.20
  6. Step 6: Final answer
    x = 1,761.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.