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Finding the Fourth Proportional to 1,405.29, 2,107.99 and 527.72

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Solution

The fourth proportional to 1,405.29, 2,107.99 and 527.72 is: 791.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.29 : 2,107.99 = 527.72 : x
  2. Step 2: Convert to fraction form
    1,405.29/2,107.99 = 527.72/x
  3. Step 3: Cross multiply
    1,405.29x = 2,107.99 × 527.72
  4. Step 4: Simplify right side
    1,405.29x = 1,112,418.60
  5. Step 5: Solve for x
    x = 1,112,418.60/1,405.29
  6. Step 6: Final answer
    x = 791.59

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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.