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Finding the Fourth Proportional to 4,918.40, 7,358.40 and 3,190.40

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Solution

The fourth proportional to 4,918.40, 7,358.40 and 3,190.40 is: 4,773.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,918.40 : 7,358.40 = 3,190.40 : x
  2. Step 2: Convert to fraction form
    4,918.40/7,358.40 = 3,190.40/x
  3. Step 3: Cross multiply
    4,918.40x = 7,358.40 × 3,190.40
  4. Step 4: Simplify right side
    4,918.40x = 23,476,239.36
  5. Step 5: Solve for x
    x = 23,476,239.36/4,918.40
  6. Step 6: Final answer
    x = 4,773.15

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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.