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Finding the Fourth Proportional to 1,409.08, 2,112.28 and 531.35

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Solution

The fourth proportional to 1,409.08, 2,112.28 and 531.35 is: 796.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.08 : 2,112.28 = 531.35 : x
  2. Step 2: Convert to fraction form
    1,409.08/2,112.28 = 531.35/x
  3. Step 3: Cross multiply
    1,409.08x = 2,112.28 × 531.35
  4. Step 4: Simplify right side
    1,409.08x = 1,122,359.98
  5. Step 5: Solve for x
    x = 1,122,359.98/1,409.08
  6. Step 6: Final answer
    x = 796.52

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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.