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Finding the Fourth Proportional to 2,098.70, 3,146.52 and 711.20

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Solution

The fourth proportional to 2,098.70, 3,146.52 and 711.20 is: 1,066.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,098.70 : 3,146.52 = 711.20 : x
  2. Step 2: Convert to fraction form
    2,098.70/3,146.52 = 711.20/x
  3. Step 3: Cross multiply
    2,098.70x = 3,146.52 × 711.20
  4. Step 4: Simplify right side
    2,098.70x = 2,237,805.02
  5. Step 5: Solve for x
    x = 2,237,805.02/2,098.70
  6. Step 6: Final answer
    x = 1,066.28

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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.