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Finding the Fourth Proportional to 2,412.54, 3,618.85 and 770.47

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Solution

The fourth proportional to 2,412.54, 3,618.85 and 770.47 is: 1,155.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,412.54 : 3,618.85 = 770.47 : x
  2. Step 2: Convert to fraction form
    2,412.54/3,618.85 = 770.47/x
  3. Step 3: Cross multiply
    2,412.54x = 3,618.85 × 770.47
  4. Step 4: Simplify right side
    2,412.54x = 2,788,204.39
  5. Step 5: Solve for x
    x = 2,788,204.39/2,412.54
  6. Step 6: Final answer
    x = 1,155.71

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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.