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Finding the Fourth Proportional to 2,425.74, 3,636 and 1,039.68

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Solution

The fourth proportional to 2,425.74, 3,636 and 1,039.68 is: 1,558.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,425.74 : 3,636 = 1,039.68 : x
  2. Step 2: Convert to fraction form
    2,425.74/3,636 = 1,039.68/x
  3. Step 3: Cross multiply
    2,425.74x = 3,636 × 1,039.68
  4. Step 4: Simplify right side
    2,425.74x = 3,780,276.48
  5. Step 5: Solve for x
    x = 3,780,276.48/2,425.74
  6. Step 6: Final answer
    x = 1,558.40

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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.