Home / 1,431.33-2,135.48-1,275.40

Finding the Fourth Proportional to 1,431.33, 2,135.48 and 1,275.40

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Solution

The fourth proportional to 1,431.33, 2,135.48 and 1,275.40 is: 1,902.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.33 : 2,135.48 = 1,275.40 : x
  2. Step 2: Convert to fraction form
    1,431.33/2,135.48 = 1,275.40/x
  3. Step 3: Cross multiply
    1,431.33x = 2,135.48 × 1,275.40
  4. Step 4: Simplify right side
    1,431.33x = 2,723,591.19
  5. Step 5: Solve for x
    x = 2,723,591.19/1,431.33
  6. Step 6: Final answer
    x = 1,902.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.