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Finding the Fourth Proportional to 1,860.98, 2,791.40 and 628.20

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Solution

The fourth proportional to 1,860.98, 2,791.40 and 628.20 is: 942.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.98 : 2,791.40 = 628.20 : x
  2. Step 2: Convert to fraction form
    1,860.98/2,791.40 = 628.20/x
  3. Step 3: Cross multiply
    1,860.98x = 2,791.40 × 628.20
  4. Step 4: Simplify right side
    1,860.98x = 1,753,554.34
  5. Step 5: Solve for x
    x = 1,753,554.34/1,860.98
  6. Step 6: Final answer
    x = 942.28

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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.