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Finding the Fourth Proportional to 1,261.53, 1,892.52 and 383.99

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Solution

The fourth proportional to 1,261.53, 1,892.52 and 383.99 is: 576.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.53 : 1,892.52 = 383.99 : x
  2. Step 2: Convert to fraction form
    1,261.53/1,892.52 = 383.99/x
  3. Step 3: Cross multiply
    1,261.53x = 1,892.52 × 383.99
  4. Step 4: Simplify right side
    1,261.53x = 726,699.29
  5. Step 5: Solve for x
    x = 726,699.29/1,261.53
  6. Step 6: Final answer
    x = 576.05

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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.