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Finding the Fourth Proportional to 2,318.70, 3,478.39 and 675.03

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Solution

The fourth proportional to 2,318.70, 3,478.39 and 675.03 is: 1,012.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,318.70 : 3,478.39 = 675.03 : x
  2. Step 2: Convert to fraction form
    2,318.70/3,478.39 = 675.03/x
  3. Step 3: Cross multiply
    2,318.70x = 3,478.39 × 675.03
  4. Step 4: Simplify right side
    2,318.70x = 2,347,996.83
  5. Step 5: Solve for x
    x = 2,347,996.83/2,318.70
  6. Step 6: Final answer
    x = 1,012.64

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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.