Home / 1,260.19-1,890.30-438.49

Finding the Fourth Proportional to 1,260.19, 1,890.30 and 438.49

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Solution

The fourth proportional to 1,260.19, 1,890.30 and 438.49 is: 657.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.19 : 1,890.30 = 438.49 : x
  2. Step 2: Convert to fraction form
    1,260.19/1,890.30 = 438.49/x
  3. Step 3: Cross multiply
    1,260.19x = 1,890.30 × 438.49
  4. Step 4: Simplify right side
    1,260.19x = 828,877.65
  5. Step 5: Solve for x
    x = 828,877.65/1,260.19
  6. Step 6: Final answer
    x = 657.74

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Double scale
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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.