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Finding the Fourth Proportional to 1,326.83, 1,990.85 and 633.51

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Solution

The fourth proportional to 1,326.83, 1,990.85 and 633.51 is: 950.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.83 : 1,990.85 = 633.51 : x
  2. Step 2: Convert to fraction form
    1,326.83/1,990.85 = 633.51/x
  3. Step 3: Cross multiply
    1,326.83x = 1,990.85 × 633.51
  4. Step 4: Simplify right side
    1,326.83x = 1,261,220.22
  5. Step 5: Solve for x
    x = 1,261,220.22/1,326.83
  6. Step 6: Final answer
    x = 950.56

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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.