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Finding the Fourth Proportional to 2,089.13, 3,133.67 and 840.29

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Solution

The fourth proportional to 2,089.13, 3,133.67 and 840.29 is: 1,260.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.13 : 3,133.67 = 840.29 : x
  2. Step 2: Convert to fraction form
    2,089.13/3,133.67 = 840.29/x
  3. Step 3: Cross multiply
    2,089.13x = 3,133.67 × 840.29
  4. Step 4: Simplify right side
    2,089.13x = 2,633,201.50
  5. Step 5: Solve for x
    x = 2,633,201.50/2,089.13
  6. Step 6: Final answer
    x = 1,260.43

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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.