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Finding the Fourth Proportional to 1,859.05, 2,788.53 and 763.48

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Solution

The fourth proportional to 1,859.05, 2,788.53 and 763.48 is: 1,145.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.05 : 2,788.53 = 763.48 : x
  2. Step 2: Convert to fraction form
    1,859.05/2,788.53 = 763.48/x
  3. Step 3: Cross multiply
    1,859.05x = 2,788.53 × 763.48
  4. Step 4: Simplify right side
    1,859.05x = 2,128,986.88
  5. Step 5: Solve for x
    x = 2,128,986.88/1,859.05
  6. Step 6: Final answer
    x = 1,145.20

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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.