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Finding the Fourth Proportional to 975.51, 1,463.22 and 819.99

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Solution

The fourth proportional to 975.51, 1,463.22 and 819.99 is: 1,229.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.51 : 1,463.22 = 819.99 : x
  2. Step 2: Convert to fraction form
    975.51/1,463.22 = 819.99/x
  3. Step 3: Cross multiply
    975.51x = 1,463.22 × 819.99
  4. Step 4: Simplify right side
    975.51x = 1,199,825.77
  5. Step 5: Solve for x
    x = 1,199,825.77/975.51
  6. Step 6: Final answer
    x = 1,229.95

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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.