Home / 1,415.22-1,948.96-1,021.62

Finding the Fourth Proportional to 1,415.22, 1,948.96 and 1,021.62

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Solution

The fourth proportional to 1,415.22, 1,948.96 and 1,021.62 is: 1,406.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.22 : 1,948.96 = 1,021.62 : x
  2. Step 2: Convert to fraction form
    1,415.22/1,948.96 = 1,021.62/x
  3. Step 3: Cross multiply
    1,415.22x = 1,948.96 × 1,021.62
  4. Step 4: Simplify right side
    1,415.22x = 1,991,086.77
  5. Step 5: Solve for x
    x = 1,991,086.77/1,415.22
  6. Step 6: Final answer
    x = 1,406.91

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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.