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Finding the Fourth Proportional to 2,087.18, 3,130.78 and 626.34

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Solution

The fourth proportional to 2,087.18, 3,130.78 and 626.34 is: 939.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.18 : 3,130.78 = 626.34 : x
  2. Step 2: Convert to fraction form
    2,087.18/3,130.78 = 626.34/x
  3. Step 3: Cross multiply
    2,087.18x = 3,130.78 × 626.34
  4. Step 4: Simplify right side
    2,087.18x = 1,960,932.75
  5. Step 5: Solve for x
    x = 1,960,932.75/2,087.18
  6. Step 6: Final answer
    x = 939.51

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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.