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Finding the Fourth Proportional to 1,416.88, 2,125.46 and 442.72

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Solution

The fourth proportional to 1,416.88, 2,125.46 and 442.72 is: 664.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.88 : 2,125.46 = 442.72 : x
  2. Step 2: Convert to fraction form
    1,416.88/2,125.46 = 442.72/x
  3. Step 3: Cross multiply
    1,416.88x = 2,125.46 × 442.72
  4. Step 4: Simplify right side
    1,416.88x = 940,983.65
  5. Step 5: Solve for x
    x = 940,983.65/1,416.88
  6. Step 6: Final answer
    x = 664.12

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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.