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Finding the Fourth Proportional to 1,329.10, 1,994.73 and 507.49

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Solution

The fourth proportional to 1,329.10, 1,994.73 and 507.49 is: 761.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.10 : 1,994.73 = 507.49 : x
  2. Step 2: Convert to fraction form
    1,329.10/1,994.73 = 507.49/x
  3. Step 3: Cross multiply
    1,329.10x = 1,994.73 × 507.49
  4. Step 4: Simplify right side
    1,329.10x = 1,012,305.53
  5. Step 5: Solve for x
    x = 1,012,305.53/1,329.10
  6. Step 6: Final answer
    x = 761.65

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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.