Home / 1,327.70-1,989.66-1,038.80

Finding the Fourth Proportional to 1,327.70, 1,989.66 and 1,038.80

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Solution

The fourth proportional to 1,327.70, 1,989.66 and 1,038.80 is: 1,556.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.70 : 1,989.66 = 1,038.80 : x
  2. Step 2: Convert to fraction form
    1,327.70/1,989.66 = 1,038.80/x
  3. Step 3: Cross multiply
    1,327.70x = 1,989.66 × 1,038.80
  4. Step 4: Simplify right side
    1,327.70x = 2,066,858.81
  5. Step 5: Solve for x
    x = 2,066,858.81/1,327.70
  6. Step 6: Final answer
    x = 1,556.72

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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.