Home / 1,639.38-2,458.80-528.66

Finding the Fourth Proportional to 1,639.38, 2,458.80 and 528.66

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Solution

The fourth proportional to 1,639.38, 2,458.80 and 528.66 is: 792.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.38 : 2,458.80 = 528.66 : x
  2. Step 2: Convert to fraction form
    1,639.38/2,458.80 = 528.66/x
  3. Step 3: Cross multiply
    1,639.38x = 2,458.80 × 528.66
  4. Step 4: Simplify right side
    1,639.38x = 1,299,869.21
  5. Step 5: Solve for x
    x = 1,299,869.21/1,639.38
  6. Step 6: Final answer
    x = 792.90

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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.