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Finding the Fourth Proportional to 2,485.71, 3,728.66 and 754.29

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Solution

The fourth proportional to 2,485.71, 3,728.66 and 754.29 is: 1,131.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.71 : 3,728.66 = 754.29 : x
  2. Step 2: Convert to fraction form
    2,485.71/3,728.66 = 754.29/x
  3. Step 3: Cross multiply
    2,485.71x = 3,728.66 × 754.29
  4. Step 4: Simplify right side
    2,485.71x = 2,812,487.18
  5. Step 5: Solve for x
    x = 2,812,487.18/2,485.71
  6. Step 6: Final answer
    x = 1,131.46

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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.