Home / 1,431.89-2,157.58-1,177.58

Finding the Fourth Proportional to 1,431.89, 2,157.58 and 1,177.58

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Solution

The fourth proportional to 1,431.89, 2,157.58 and 1,177.58 is: 1,774.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.89 : 2,157.58 = 1,177.58 : x
  2. Step 2: Convert to fraction form
    1,431.89/2,157.58 = 1,177.58/x
  3. Step 3: Cross multiply
    1,431.89x = 2,157.58 × 1,177.58
  4. Step 4: Simplify right side
    1,431.89x = 2,540,725.88
  5. Step 5: Solve for x
    x = 2,540,725.88/1,431.89
  6. Step 6: Final answer
    x = 1,774.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.