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Finding the Fourth Proportional to 1,508.49, 2,081.84 and 879.07

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Solution

The fourth proportional to 1,508.49, 2,081.84 and 879.07 is: 1,213.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,508.49 : 2,081.84 = 879.07 : x
  2. Step 2: Convert to fraction form
    1,508.49/2,081.84 = 879.07/x
  3. Step 3: Cross multiply
    1,508.49x = 2,081.84 × 879.07
  4. Step 4: Simplify right side
    1,508.49x = 1,830,084.81
  5. Step 5: Solve for x
    x = 1,830,084.81/1,508.49
  6. Step 6: Final answer
    x = 1,213.19

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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.