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Finding the Fourth Proportional to 2,632.81, 3,948.83 and 783.85

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Solution

The fourth proportional to 2,632.81, 3,948.83 and 783.85 is: 1,175.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,632.81 : 3,948.83 = 783.85 : x
  2. Step 2: Convert to fraction form
    2,632.81/3,948.83 = 783.85/x
  3. Step 3: Cross multiply
    2,632.81x = 3,948.83 × 783.85
  4. Step 4: Simplify right side
    2,632.81x = 3,095,266.73
  5. Step 5: Solve for x
    x = 3,095,266.73/2,632.81
  6. Step 6: Final answer
    x = 1,175.65

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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.