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Finding the Fourth Proportional to 1,149.83, 1,725.00 and 419.40

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Solution

The fourth proportional to 1,149.83, 1,725.00 and 419.40 is: 629.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.83 : 1,725.00 = 419.40 : x
  2. Step 2: Convert to fraction form
    1,149.83/1,725.00 = 419.40/x
  3. Step 3: Cross multiply
    1,149.83x = 1,725.00 × 419.40
  4. Step 4: Simplify right side
    1,149.83x = 723,471.08
  5. Step 5: Solve for x
    x = 723,471.08/1,149.83
  6. Step 6: Final answer
    x = 629.20

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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.