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Finding the Fourth Proportional to 1,859.44, 2,789.47 and 763.87

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Solution

The fourth proportional to 1,859.44, 2,789.47 and 763.87 is: 1,145.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.44 : 2,789.47 = 763.87 : x
  2. Step 2: Convert to fraction form
    1,859.44/2,789.47 = 763.87/x
  3. Step 3: Cross multiply
    1,859.44x = 2,789.47 × 763.87
  4. Step 4: Simplify right side
    1,859.44x = 2,130,792.45
  5. Step 5: Solve for x
    x = 2,130,792.45/1,859.44
  6. Step 6: Final answer
    x = 1,145.93

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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.