Home / 4,289.28-6,433.56-1,980.78

Finding the Fourth Proportional to 4,289.28, 6,433.56 and 1,980.78

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Solution

The fourth proportional to 4,289.28, 6,433.56 and 1,980.78 is: 2,971.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,289.28 : 6,433.56 = 1,980.78 : x
  2. Step 2: Convert to fraction form
    4,289.28/6,433.56 = 1,980.78/x
  3. Step 3: Cross multiply
    4,289.28x = 6,433.56 × 1,980.78
  4. Step 4: Simplify right side
    4,289.28x = 12,743,466.98
  5. Step 5: Solve for x
    x = 12,743,466.98/4,289.28
  6. Step 6: Final answer
    x = 2,971.00

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1.5x scale

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.