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Finding the Fourth Proportional to 2,070.72, 3,106.44 and 772.20

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Solution

The fourth proportional to 2,070.72, 3,106.44 and 772.20 is: 1,158.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,070.72 : 3,106.44 = 772.20 : x
  2. Step 2: Convert to fraction form
    2,070.72/3,106.44 = 772.20/x
  3. Step 3: Cross multiply
    2,070.72x = 3,106.44 × 772.20
  4. Step 4: Simplify right side
    2,070.72x = 2,398,792.97
  5. Step 5: Solve for x
    x = 2,398,792.97/2,070.72
  6. Step 6: Final answer
    x = 1,158.43

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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.