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Finding the Fourth Proportional to 1,860.60, 2,788.86 and 764.67

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Solution

The fourth proportional to 1,860.60, 2,788.86 and 764.67 is: 1,146.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.60 : 2,788.86 = 764.67 : x
  2. Step 2: Convert to fraction form
    1,860.60/2,788.86 = 764.67/x
  3. Step 3: Cross multiply
    1,860.60x = 2,788.86 × 764.67
  4. Step 4: Simplify right side
    1,860.60x = 2,132,557.58
  5. Step 5: Solve for x
    x = 2,132,557.58/1,860.60
  6. Step 6: Final answer
    x = 1,146.17

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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.