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Finding the Fourth Proportional to 1,621.75, 2,433.45 and 744.25

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Solution

The fourth proportional to 1,621.75, 2,433.45 and 744.25 is: 1,116.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.75 : 2,433.45 = 744.25 : x
  2. Step 2: Convert to fraction form
    1,621.75/2,433.45 = 744.25/x
  3. Step 3: Cross multiply
    1,621.75x = 2,433.45 × 744.25
  4. Step 4: Simplify right side
    1,621.75x = 1,811,095.16
  5. Step 5: Solve for x
    x = 1,811,095.16/1,621.75
  6. Step 6: Final answer
    x = 1,116.75

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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.