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Finding the Fourth Proportional to 2,019.60, 3,026.70 and 864

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Solution

The fourth proportional to 2,019.60, 3,026.70 and 864 is: 1,294.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,019.60 : 3,026.70 = 864 : x
  2. Step 2: Convert to fraction form
    2,019.60/3,026.70 = 864/x
  3. Step 3: Cross multiply
    2,019.60x = 3,026.70 × 864
  4. Step 4: Simplify right side
    2,019.60x = 2,615,068.80
  5. Step 5: Solve for x
    x = 2,615,068.80/2,019.60
  6. Step 6: Final answer
    x = 1,294.84

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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.