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Finding the Fourth Proportional to 2,190.45, 3,285.16 and 630.45

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Solution

The fourth proportional to 2,190.45, 3,285.16 and 630.45 is: 945.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.45 : 3,285.16 = 630.45 : x
  2. Step 2: Convert to fraction form
    2,190.45/3,285.16 = 630.45/x
  3. Step 3: Cross multiply
    2,190.45x = 3,285.16 × 630.45
  4. Step 4: Simplify right side
    2,190.45x = 2,071,129.12
  5. Step 5: Solve for x
    x = 2,071,129.12/2,190.45
  6. Step 6: Final answer
    x = 945.53

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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.