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Finding the Fourth Proportional to 5,186.84, 7,780.23 and 1,489.09

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Solution

The fourth proportional to 5,186.84, 7,780.23 and 1,489.09 is: 2,233.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,186.84 : 7,780.23 = 1,489.09 : x
  2. Step 2: Convert to fraction form
    5,186.84/7,780.23 = 1,489.09/x
  3. Step 3: Cross multiply
    5,186.84x = 7,780.23 × 1,489.09
  4. Step 4: Simplify right side
    5,186.84x = 11,585,462.69
  5. Step 5: Solve for x
    x = 11,585,462.69/5,186.84
  6. Step 6: Final answer
    x = 2,233.63

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1.5x scale

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.