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Finding the Fourth Proportional to 1,422.88, 2,135.04 and 738.88

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Solution

The fourth proportional to 1,422.88, 2,135.04 and 738.88 is: 1,108.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.88 : 2,135.04 = 738.88 : x
  2. Step 2: Convert to fraction form
    1,422.88/2,135.04 = 738.88/x
  3. Step 3: Cross multiply
    1,422.88x = 2,135.04 × 738.88
  4. Step 4: Simplify right side
    1,422.88x = 1,577,538.36
  5. Step 5: Solve for x
    x = 1,577,538.36/1,422.88
  6. Step 6: Final answer
    x = 1,108.69

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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.