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Finding the Fourth Proportional to 1,326.84, 1,990.38 and 633.38

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Solution

The fourth proportional to 1,326.84, 1,990.38 and 633.38 is: 950.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.84 : 1,990.38 = 633.38 : x
  2. Step 2: Convert to fraction form
    1,326.84/1,990.38 = 633.38/x
  3. Step 3: Cross multiply
    1,326.84x = 1,990.38 × 633.38
  4. Step 4: Simplify right side
    1,326.84x = 1,260,666.88
  5. Step 5: Solve for x
    x = 1,260,666.88/1,326.84
  6. Step 6: Final answer
    x = 950.13

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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.