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Finding the Fourth Proportional to 2,089.72, 3,135.10 and 628.84

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Solution

The fourth proportional to 2,089.72, 3,135.10 and 628.84 is: 943.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.72 : 3,135.10 = 628.84 : x
  2. Step 2: Convert to fraction form
    2,089.72/3,135.10 = 628.84/x
  3. Step 3: Cross multiply
    2,089.72x = 3,135.10 × 628.84
  4. Step 4: Simplify right side
    2,089.72x = 1,971,476.28
  5. Step 5: Solve for x
    x = 1,971,476.28/2,089.72
  6. Step 6: Final answer
    x = 943.42

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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.