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Finding the Fourth Proportional to 1,615.44, 2,422.68 and 628.20

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Solution

The fourth proportional to 1,615.44, 2,422.68 and 628.20 is: 942.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.44 : 2,422.68 = 628.20 : x
  2. Step 2: Convert to fraction form
    1,615.44/2,422.68 = 628.20/x
  3. Step 3: Cross multiply
    1,615.44x = 2,422.68 × 628.20
  4. Step 4: Simplify right side
    1,615.44x = 1,521,927.58
  5. Step 5: Solve for x
    x = 1,521,927.58/1,615.44
  6. Step 6: Final answer
    x = 942.11

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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.