Home / 1,260.12-1,890.60-438.36

Finding the Fourth Proportional to 1,260.12, 1,890.60 and 438.36

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Solution

The fourth proportional to 1,260.12, 1,890.60 and 438.36 is: 657.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.12 : 1,890.60 = 438.36 : x
  2. Step 2: Convert to fraction form
    1,260.12/1,890.60 = 438.36/x
  3. Step 3: Cross multiply
    1,260.12x = 1,890.60 × 438.36
  4. Step 4: Simplify right side
    1,260.12x = 828,763.42
  5. Step 5: Solve for x
    x = 828,763.42/1,260.12
  6. Step 6: Final answer
    x = 657.69

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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.