Home / 2,151.46-2,968.85-1,207.20

Finding the Fourth Proportional to 2,151.46, 2,968.85 and 1,207.20

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Solution

The fourth proportional to 2,151.46, 2,968.85 and 1,207.20 is: 1,665.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.46 : 2,968.85 = 1,207.20 : x
  2. Step 2: Convert to fraction form
    2,151.46/2,968.85 = 1,207.20/x
  3. Step 3: Cross multiply
    2,151.46x = 2,968.85 × 1,207.20
  4. Step 4: Simplify right side
    2,151.46x = 3,584,009.87
  5. Step 5: Solve for x
    x = 3,584,009.87/2,151.46
  6. Step 6: Final answer
    x = 1,665.85

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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.