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Finding the Fourth Proportional to 1,022.20, 1,541.29 and 986.20

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Solution

The fourth proportional to 1,022.20, 1,541.29 and 986.20 is: 1,487.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.20 : 1,541.29 = 986.20 : x
  2. Step 2: Convert to fraction form
    1,022.20/1,541.29 = 986.20/x
  3. Step 3: Cross multiply
    1,022.20x = 1,541.29 × 986.20
  4. Step 4: Simplify right side
    1,022.20x = 1,520,020.20
  5. Step 5: Solve for x
    x = 1,520,020.20/1,022.20
  6. Step 6: Final answer
    x = 1,487.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.