Home / 4,990.28-7,485.87-1,292.50

Finding the Fourth Proportional to 4,990.28, 7,485.87 and 1,292.50

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Solution

The fourth proportional to 4,990.28, 7,485.87 and 1,292.50 is: 1,938.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.28 : 7,485.87 = 1,292.50 : x
  2. Step 2: Convert to fraction form
    4,990.28/7,485.87 = 1,292.50/x
  3. Step 3: Cross multiply
    4,990.28x = 7,485.87 × 1,292.50
  4. Step 4: Simplify right side
    4,990.28x = 9,675,449.55
  5. Step 5: Solve for x
    x = 9,675,449.55/4,990.28
  6. Step 6: Final answer
    x = 1,938.86

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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.