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Finding the Fourth Proportional to 1,519.22, 2,278.40 and 641.92

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Solution

The fourth proportional to 1,519.22, 2,278.40 and 641.92 is: 962.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.22 : 2,278.40 = 641.92 : x
  2. Step 2: Convert to fraction form
    1,519.22/2,278.40 = 641.92/x
  3. Step 3: Cross multiply
    1,519.22x = 2,278.40 × 641.92
  4. Step 4: Simplify right side
    1,519.22x = 1,462,541.62
  5. Step 5: Solve for x
    x = 1,462,541.62/1,519.22
  6. Step 6: Final answer
    x = 962.69

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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.