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Finding the Fourth Proportional to 2,220.68, 3,330.45 and 660.32

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Solution

The fourth proportional to 2,220.68, 3,330.45 and 660.32 is: 990.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.68 : 3,330.45 = 660.32 : x
  2. Step 2: Convert to fraction form
    2,220.68/3,330.45 = 660.32/x
  3. Step 3: Cross multiply
    2,220.68x = 3,330.45 × 660.32
  4. Step 4: Simplify right side
    2,220.68x = 2,199,162.74
  5. Step 5: Solve for x
    x = 2,199,162.74/2,220.68
  6. Step 6: Final answer
    x = 990.31

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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.