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Finding the Fourth Proportional to 1,859.98, 2,790.21 and 627.13

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Solution

The fourth proportional to 1,859.98, 2,790.21 and 627.13 is: 940.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.98 : 2,790.21 = 627.13 : x
  2. Step 2: Convert to fraction form
    1,859.98/2,790.21 = 627.13/x
  3. Step 3: Cross multiply
    1,859.98x = 2,790.21 × 627.13
  4. Step 4: Simplify right side
    1,859.98x = 1,749,824.40
  5. Step 5: Solve for x
    x = 1,749,824.40/1,859.98
  6. Step 6: Final answer
    x = 940.78

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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.