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Finding the Fourth Proportional to 1,400.79, 2,101.19 and 630.39

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Solution

The fourth proportional to 1,400.79, 2,101.19 and 630.39 is: 945.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.79 : 2,101.19 = 630.39 : x
  2. Step 2: Convert to fraction form
    1,400.79/2,101.19 = 630.39/x
  3. Step 3: Cross multiply
    1,400.79x = 2,101.19 × 630.39
  4. Step 4: Simplify right side
    1,400.79x = 1,324,569.16
  5. Step 5: Solve for x
    x = 1,324,569.16/1,400.79
  6. Step 6: Final answer
    x = 945.59

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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.