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Finding the Fourth Proportional to 1,416.89, 2,125.89 and 636.68

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Solution

The fourth proportional to 1,416.89, 2,125.89 and 636.68 is: 955.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.89 : 2,125.89 = 636.68 : x
  2. Step 2: Convert to fraction form
    1,416.89/2,125.89 = 636.68/x
  3. Step 3: Cross multiply
    1,416.89x = 2,125.89 × 636.68
  4. Step 4: Simplify right side
    1,416.89x = 1,353,511.65
  5. Step 5: Solve for x
    x = 1,353,511.65/1,416.89
  6. Step 6: Final answer
    x = 955.27

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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.