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Finding the Fourth Proportional to 1,409.43, 2,113.64 and 484.75

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Solution

The fourth proportional to 1,409.43, 2,113.64 and 484.75 is: 726.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.43 : 2,113.64 = 484.75 : x
  2. Step 2: Convert to fraction form
    1,409.43/2,113.64 = 484.75/x
  3. Step 3: Cross multiply
    1,409.43x = 2,113.64 × 484.75
  4. Step 4: Simplify right side
    1,409.43x = 1,024,586.99
  5. Step 5: Solve for x
    x = 1,024,586.99/1,409.43
  6. Step 6: Final answer
    x = 726.95

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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.