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Finding the Fourth Proportional to 2,164.40, 3,244.65 and 777.41

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Solution

The fourth proportional to 2,164.40, 3,244.65 and 777.41 is: 1,165.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,164.40 : 3,244.65 = 777.41 : x
  2. Step 2: Convert to fraction form
    2,164.40/3,244.65 = 777.41/x
  3. Step 3: Cross multiply
    2,164.40x = 3,244.65 × 777.41
  4. Step 4: Simplify right side
    2,164.40x = 2,522,420.76
  5. Step 5: Solve for x
    x = 2,522,420.76/2,164.40
  6. Step 6: Final answer
    x = 1,165.41

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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.