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Finding the Fourth Proportional to 2,168.88, 3,253.80 and 630

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Solution

The fourth proportional to 2,168.88, 3,253.80 and 630 is: 945.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,168.88 : 3,253.80 = 630 : x
  2. Step 2: Convert to fraction form
    2,168.88/3,253.80 = 630/x
  3. Step 3: Cross multiply
    2,168.88x = 3,253.80 × 630
  4. Step 4: Simplify right side
    2,168.88x = 2,049,894
  5. Step 5: Solve for x
    x = 2,049,894/2,168.88
  6. Step 6: Final answer
    x = 945.14

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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.