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Finding the Fourth Proportional to 4,986.85, 7,479.72 and 1,289.10

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Solution

The fourth proportional to 4,986.85, 7,479.72 and 1,289.10 is: 1,933.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.85 : 7,479.72 = 1,289.10 : x
  2. Step 2: Convert to fraction form
    4,986.85/7,479.72 = 1,289.10/x
  3. Step 3: Cross multiply
    4,986.85x = 7,479.72 × 1,289.10
  4. Step 4: Simplify right side
    4,986.85x = 9,642,107.05
  5. Step 5: Solve for x
    x = 9,642,107.05/4,986.85
  6. Step 6: Final answer
    x = 1,933.51

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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.