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Finding the Fourth Proportional to 1,326.86, 1,990.25 and 634.01

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Solution

The fourth proportional to 1,326.86, 1,990.25 and 634.01 is: 951.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.86 : 1,990.25 = 634.01 : x
  2. Step 2: Convert to fraction form
    1,326.86/1,990.25 = 634.01/x
  3. Step 3: Cross multiply
    1,326.86x = 1,990.25 × 634.01
  4. Step 4: Simplify right side
    1,326.86x = 1,261,842.59
  5. Step 5: Solve for x
    x = 1,261,842.59/1,326.86
  6. Step 6: Final answer
    x = 951.00

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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.