Home / 1,260.34-1,890.50-438.38

Finding the Fourth Proportional to 1,260.34, 1,890.50 and 438.38

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Solution

The fourth proportional to 1,260.34, 1,890.50 and 438.38 is: 657.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.34 : 1,890.50 = 438.38 : x
  2. Step 2: Convert to fraction form
    1,260.34/1,890.50 = 438.38/x
  3. Step 3: Cross multiply
    1,260.34x = 1,890.50 × 438.38
  4. Step 4: Simplify right side
    1,260.34x = 828,757.39
  5. Step 5: Solve for x
    x = 828,757.39/1,260.34
  6. Step 6: Final answer
    x = 657.57

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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.