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Finding the Fourth Proportional to 1,152.82, 1,729.26 and 287.14

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Solution

The fourth proportional to 1,152.82, 1,729.26 and 287.14 is: 430.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.82 : 1,729.26 = 287.14 : x
  2. Step 2: Convert to fraction form
    1,152.82/1,729.26 = 287.14/x
  3. Step 3: Cross multiply
    1,152.82x = 1,729.26 × 287.14
  4. Step 4: Simplify right side
    1,152.82x = 496,539.72
  5. Step 5: Solve for x
    x = 496,539.72/1,152.82
  6. Step 6: Final answer
    x = 430.72

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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.