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Finding the Fourth Proportional to 1,342.88, 2,014.40 and 418.42

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Solution

The fourth proportional to 1,342.88, 2,014.40 and 418.42 is: 627.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,342.88 : 2,014.40 = 418.42 : x
  2. Step 2: Convert to fraction form
    1,342.88/2,014.40 = 418.42/x
  3. Step 3: Cross multiply
    1,342.88x = 2,014.40 × 418.42
  4. Step 4: Simplify right side
    1,342.88x = 842,865.25
  5. Step 5: Solve for x
    x = 842,865.25/1,342.88
  6. Step 6: Final answer
    x = 627.65

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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.