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Finding the Fourth Proportional to 1,409.81, 2,112.08 and 587.25

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Solution

The fourth proportional to 1,409.81, 2,112.08 and 587.25 is: 879.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.81 : 2,112.08 = 587.25 : x
  2. Step 2: Convert to fraction form
    1,409.81/2,112.08 = 587.25/x
  3. Step 3: Cross multiply
    1,409.81x = 2,112.08 × 587.25
  4. Step 4: Simplify right side
    1,409.81x = 1,240,316.04
  5. Step 5: Solve for x
    x = 1,240,316.04/1,409.81
  6. Step 6: Final answer
    x = 879.78

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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.