Home / 1,639.81-2,458.32-1,330.89

Finding the Fourth Proportional to 1,639.81, 2,458.32 and 1,330.89

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Solution

The fourth proportional to 1,639.81, 2,458.32 and 1,330.89 is: 1,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.81 : 2,458.32 = 1,330.89 : x
  2. Step 2: Convert to fraction form
    1,639.81/2,458.32 = 1,330.89/x
  3. Step 3: Cross multiply
    1,639.81x = 2,458.32 × 1,330.89
  4. Step 4: Simplify right side
    1,639.81x = 3,271,753.50
  5. Step 5: Solve for x
    x = 3,271,753.50/1,639.81
  6. Step 6: Final answer
    x = 1,995.20

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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.