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Finding the Fourth Proportional to 2,039.60, 3,057.35 and 870.36

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Solution

The fourth proportional to 2,039.60, 3,057.35 and 870.36 is: 1,304.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,039.60 : 3,057.35 = 870.36 : x
  2. Step 2: Convert to fraction form
    2,039.60/3,057.35 = 870.36/x
  3. Step 3: Cross multiply
    2,039.60x = 3,057.35 × 870.36
  4. Step 4: Simplify right side
    2,039.60x = 2,660,990.79
  5. Step 5: Solve for x
    x = 2,660,990.79/2,039.60
  6. Step 6: Final answer
    x = 1,304.67

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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.