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Finding the Fourth Proportional to 2,087.55, 3,130.40 and 626.42

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Solution

The fourth proportional to 2,087.55, 3,130.40 and 626.42 is: 939.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.55 : 3,130.40 = 626.42 : x
  2. Step 2: Convert to fraction form
    2,087.55/3,130.40 = 626.42/x
  3. Step 3: Cross multiply
    2,087.55x = 3,130.40 × 626.42
  4. Step 4: Simplify right side
    2,087.55x = 1,960,954.56
  5. Step 5: Solve for x
    x = 1,960,954.56/2,087.55
  6. Step 6: Final answer
    x = 939.36

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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.