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Finding the Fourth Proportional to 1,334.07, 1,999.69 and 512.12

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Solution

The fourth proportional to 1,334.07, 1,999.69 and 512.12 is: 767.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.07 : 1,999.69 = 512.12 : x
  2. Step 2: Convert to fraction form
    1,334.07/1,999.69 = 512.12/x
  3. Step 3: Cross multiply
    1,334.07x = 1,999.69 × 512.12
  4. Step 4: Simplify right side
    1,334.07x = 1,024,084.96
  5. Step 5: Solve for x
    x = 1,024,084.96/1,334.07
  6. Step 6: Final answer
    x = 767.64

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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.