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Finding the Fourth Proportional to 1,329.80, 1,994.97 and 508.30

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Solution

The fourth proportional to 1,329.80, 1,994.97 and 508.30 is: 762.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.80 : 1,994.97 = 508.30 : x
  2. Step 2: Convert to fraction form
    1,329.80/1,994.97 = 508.30/x
  3. Step 3: Cross multiply
    1,329.80x = 1,994.97 × 508.30
  4. Step 4: Simplify right side
    1,329.80x = 1,014,040.17
  5. Step 5: Solve for x
    x = 1,014,040.17/1,329.80
  6. Step 6: Final answer
    x = 762.55

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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.