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Finding the Fourth Proportional to 2,039.79, 3,058.68 and 870.33

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Solution

The fourth proportional to 2,039.79, 3,058.68 and 870.33 is: 1,305.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,039.79 : 3,058.68 = 870.33 : x
  2. Step 2: Convert to fraction form
    2,039.79/3,058.68 = 870.33/x
  3. Step 3: Cross multiply
    2,039.79x = 3,058.68 × 870.33
  4. Step 4: Simplify right side
    2,039.79x = 2,662,060.96
  5. Step 5: Solve for x
    x = 2,662,060.96/2,039.79
  6. Step 6: Final answer
    x = 1,305.07

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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.