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Finding the Fourth Proportional to 1,326.84, 1,989.68 and 546.30

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Solution

The fourth proportional to 1,326.84, 1,989.68 and 546.30 is: 819.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.84 : 1,989.68 = 546.30 : x
  2. Step 2: Convert to fraction form
    1,326.84/1,989.68 = 546.30/x
  3. Step 3: Cross multiply
    1,326.84x = 1,989.68 × 546.30
  4. Step 4: Simplify right side
    1,326.84x = 1,086,959.45
  5. Step 5: Solve for x
    x = 1,086,959.45/1,326.84
  6. Step 6: Final answer
    x = 819.21

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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.