Home / 1,575.78-2,172.60-1,015.32

Finding the Fourth Proportional to 1,575.78, 2,172.60 and 1,015.32

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Solution

The fourth proportional to 1,575.78, 2,172.60 and 1,015.32 is: 1,399.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.78 : 2,172.60 = 1,015.32 : x
  2. Step 2: Convert to fraction form
    1,575.78/2,172.60 = 1,015.32/x
  3. Step 3: Cross multiply
    1,575.78x = 2,172.60 × 1,015.32
  4. Step 4: Simplify right side
    1,575.78x = 2,205,884.23
  5. Step 5: Solve for x
    x = 2,205,884.23/1,575.78
  6. Step 6: Final answer
    x = 1,399.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.