Home / 1,575.11-2,171.81-1,015.61

Finding the Fourth Proportional to 1,575.11, 2,171.81 and 1,015.61

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Solution

The fourth proportional to 1,575.11, 2,171.81 and 1,015.61 is: 1,400.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.11 : 2,171.81 = 1,015.61 : x
  2. Step 2: Convert to fraction form
    1,575.11/2,171.81 = 1,015.61/x
  3. Step 3: Cross multiply
    1,575.11x = 2,171.81 × 1,015.61
  4. Step 4: Simplify right side
    1,575.11x = 2,205,703.63
  5. Step 5: Solve for x
    x = 2,205,703.63/1,575.11
  6. Step 6: Final answer
    x = 1,400.35

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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.