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Finding the Fourth Proportional to 1,969.16, 2,718.72 and 1,520.20

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Solution

The fourth proportional to 1,969.16, 2,718.72 and 1,520.20 is: 2,098.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.16 : 2,718.72 = 1,520.20 : x
  2. Step 2: Convert to fraction form
    1,969.16/2,718.72 = 1,520.20/x
  3. Step 3: Cross multiply
    1,969.16x = 2,718.72 × 1,520.20
  4. Step 4: Simplify right side
    1,969.16x = 4,132,998.14
  5. Step 5: Solve for x
    x = 4,132,998.14/1,969.16
  6. Step 6: Final answer
    x = 2,098.86

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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.