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Finding the Fourth Proportional to 1,409.10, 1,944.87 and 819.93

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Solution

The fourth proportional to 1,409.10, 1,944.87 and 819.93 is: 1,131.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.10 : 1,944.87 = 819.93 : x
  2. Step 2: Convert to fraction form
    1,409.10/1,944.87 = 819.93/x
  3. Step 3: Cross multiply
    1,409.10x = 1,944.87 × 819.93
  4. Step 4: Simplify right side
    1,409.10x = 1,594,657.26
  5. Step 5: Solve for x
    x = 1,594,657.26/1,409.10
  6. Step 6: Final answer
    x = 1,131.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.