Home / 2,990.56-4,485.92-1,897.12

Finding the Fourth Proportional to 2,990.56, 4,485.92 and 1,897.12

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Solution

The fourth proportional to 2,990.56, 4,485.92 and 1,897.12 is: 2,845.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.56 : 4,485.92 = 1,897.12 : x
  2. Step 2: Convert to fraction form
    2,990.56/4,485.92 = 1,897.12/x
  3. Step 3: Cross multiply
    2,990.56x = 4,485.92 × 1,897.12
  4. Step 4: Simplify right side
    2,990.56x = 8,510,328.55
  5. Step 5: Solve for x
    x = 8,510,328.55/2,990.56
  6. Step 6: Final answer
    x = 2,845.73

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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.