Home / 2,890.61-3,989.08-1,631.73

Finding the Fourth Proportional to 2,890.61, 3,989.08 and 1,631.73

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Solution

The fourth proportional to 2,890.61, 3,989.08 and 1,631.73 is: 2,251.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.61 : 3,989.08 = 1,631.73 : x
  2. Step 2: Convert to fraction form
    2,890.61/3,989.08 = 1,631.73/x
  3. Step 3: Cross multiply
    2,890.61x = 3,989.08 × 1,631.73
  4. Step 4: Simplify right side
    2,890.61x = 6,509,101.51
  5. Step 5: Solve for x
    x = 6,509,101.51/2,890.61
  6. Step 6: Final answer
    x = 2,251.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.