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Finding the Fourth Proportional to 1,245.62, 1,867.82 and 725.74

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Solution

The fourth proportional to 1,245.62, 1,867.82 and 725.74 is: 1,088.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.62 : 1,867.82 = 725.74 : x
  2. Step 2: Convert to fraction form
    1,245.62/1,867.82 = 725.74/x
  3. Step 3: Cross multiply
    1,245.62x = 1,867.82 × 725.74
  4. Step 4: Simplify right side
    1,245.62x = 1,355,543.39
  5. Step 5: Solve for x
    x = 1,355,543.39/1,245.62
  6. Step 6: Final answer
    x = 1,088.25

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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.