Home / 4,286.78-6,430.20-1,208.78

Finding the Fourth Proportional to 4,286.78, 6,430.20 and 1,208.78

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Solution

The fourth proportional to 4,286.78, 6,430.20 and 1,208.78 is: 1,813.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,286.78 : 6,430.20 = 1,208.78 : x
  2. Step 2: Convert to fraction form
    4,286.78/6,430.20 = 1,208.78/x
  3. Step 3: Cross multiply
    4,286.78x = 6,430.20 × 1,208.78
  4. Step 4: Simplify right side
    4,286.78x = 7,772,697.16
  5. Step 5: Solve for x
    x = 7,772,697.16/4,286.78
  6. Step 6: Final answer
    x = 1,813.18

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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.