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Finding the Fourth Proportional to 4,986.42, 7,479.02 and 1,288.91

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Solution

The fourth proportional to 4,986.42, 7,479.02 and 1,288.91 is: 1,933.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.42 : 7,479.02 = 1,288.91 : x
  2. Step 2: Convert to fraction form
    4,986.42/7,479.02 = 1,288.91/x
  3. Step 3: Cross multiply
    4,986.42x = 7,479.02 × 1,288.91
  4. Step 4: Simplify right side
    4,986.42x = 9,639,739.83
  5. Step 5: Solve for x
    x = 9,639,739.83/4,986.42
  6. Step 6: Final answer
    x = 1,933.20

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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.