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Finding the Fourth Proportional to 1,610.60, 2,415.49 and 776.84

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Solution

The fourth proportional to 1,610.60, 2,415.49 and 776.84 is: 1,165.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,610.60 : 2,415.49 = 776.84 : x
  2. Step 2: Convert to fraction form
    1,610.60/2,415.49 = 776.84/x
  3. Step 3: Cross multiply
    1,610.60x = 2,415.49 × 776.84
  4. Step 4: Simplify right side
    1,610.60x = 1,876,435.23
  5. Step 5: Solve for x
    x = 1,876,435.23/1,610.60
  6. Step 6: Final answer
    x = 1,165.06

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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.