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Finding the Fourth Proportional to 1,033.71, 1,550.59 and 485.75

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Solution

The fourth proportional to 1,033.71, 1,550.59 and 485.75 is: 728.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.71 : 1,550.59 = 485.75 : x
  2. Step 2: Convert to fraction form
    1,033.71/1,550.59 = 485.75/x
  3. Step 3: Cross multiply
    1,033.71x = 1,550.59 × 485.75
  4. Step 4: Simplify right side
    1,033.71x = 753,190.13
  5. Step 5: Solve for x
    x = 753,190.13/1,033.71
  6. Step 6: Final answer
    x = 728.63

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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.