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Finding the Fourth Proportional to 1,781.43, 2,670.31 and 902.29

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Solution

The fourth proportional to 1,781.43, 2,670.31 and 902.29 is: 1,352.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.43 : 2,670.31 = 902.29 : x
  2. Step 2: Convert to fraction form
    1,781.43/2,670.31 = 902.29/x
  3. Step 3: Cross multiply
    1,781.43x = 2,670.31 × 902.29
  4. Step 4: Simplify right side
    1,781.43x = 2,409,394.01
  5. Step 5: Solve for x
    x = 2,409,394.01/1,781.43
  6. Step 6: Final answer
    x = 1,352.51

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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.