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Finding the Fourth Proportional to 1,204.60, 1,807 and 511.12

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Solution

The fourth proportional to 1,204.60, 1,807 and 511.12 is: 766.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,204.60 : 1,807 = 511.12 : x
  2. Step 2: Convert to fraction form
    1,204.60/1,807 = 511.12/x
  3. Step 3: Cross multiply
    1,204.60x = 1,807 × 511.12
  4. Step 4: Simplify right side
    1,204.60x = 923,593.84
  5. Step 5: Solve for x
    x = 923,593.84/1,204.60
  6. Step 6: Final answer
    x = 766.72

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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.