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Finding the Fourth Proportional to 1,762.90, 2,644.28 and 839.09

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Solution

The fourth proportional to 1,762.90, 2,644.28 and 839.09 is: 1,258.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,762.90 : 2,644.28 = 839.09 : x
  2. Step 2: Convert to fraction form
    1,762.90/2,644.28 = 839.09/x
  3. Step 3: Cross multiply
    1,762.90x = 2,644.28 × 839.09
  4. Step 4: Simplify right side
    1,762.90x = 2,218,794.47
  5. Step 5: Solve for x
    x = 2,218,794.47/1,762.90
  6. Step 6: Final answer
    x = 1,258.61

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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.