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Finding the Fourth Proportional to 1,860.11, 2,790.43 and 627.88

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Solution

The fourth proportional to 1,860.11, 2,790.43 and 627.88 is: 941.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.11 : 2,790.43 = 627.88 : x
  2. Step 2: Convert to fraction form
    1,860.11/2,790.43 = 627.88/x
  3. Step 3: Cross multiply
    1,860.11x = 2,790.43 × 627.88
  4. Step 4: Simplify right side
    1,860.11x = 1,752,038.10
  5. Step 5: Solve for x
    x = 1,752,038.10/1,860.11
  6. Step 6: Final answer
    x = 941.90

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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.