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Finding the Fourth Proportional to 2,190.31, 3,285.42 and 630.33

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Solution

The fourth proportional to 2,190.31, 3,285.42 and 630.33 is: 945.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.31 : 3,285.42 = 630.33 : x
  2. Step 2: Convert to fraction form
    2,190.31/3,285.42 = 630.33/x
  3. Step 3: Cross multiply
    2,190.31x = 3,285.42 × 630.33
  4. Step 4: Simplify right side
    2,190.31x = 2,070,898.79
  5. Step 5: Solve for x
    x = 2,070,898.79/2,190.31
  6. Step 6: Final answer
    x = 945.48

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1.5x scale

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.