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Finding the Fourth Proportional to 1,860.20, 2,790 and 627.56

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Solution

The fourth proportional to 1,860.20, 2,790 and 627.56 is: 941.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.20 : 2,790 = 627.56 : x
  2. Step 2: Convert to fraction form
    1,860.20/2,790 = 627.56/x
  3. Step 3: Cross multiply
    1,860.20x = 2,790 × 627.56
  4. Step 4: Simplify right side
    1,860.20x = 1,750,892.40
  5. Step 5: Solve for x
    x = 1,750,892.40/1,860.20
  6. Step 6: Final answer
    x = 941.24

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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.