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Finding the Fourth Proportional to 943.49, 1,416.12 and 505.12

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Solution

The fourth proportional to 943.49, 1,416.12 and 505.12 is: 758.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.49 : 1,416.12 = 505.12 : x
  2. Step 2: Convert to fraction form
    943.49/1,416.12 = 505.12/x
  3. Step 3: Cross multiply
    943.49x = 1,416.12 × 505.12
  4. Step 4: Simplify right side
    943.49x = 715,310.53
  5. Step 5: Solve for x
    x = 715,310.53/943.49
  6. Step 6: Final answer
    x = 758.15

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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.