Home / 1,582.20-2,181.40-1,021.68

Finding the Fourth Proportional to 1,582.20, 2,181.40 and 1,021.68

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Solution

The fourth proportional to 1,582.20, 2,181.40 and 1,021.68 is: 1,408.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,582.20 : 2,181.40 = 1,021.68 : x
  2. Step 2: Convert to fraction form
    1,582.20/2,181.40 = 1,021.68/x
  3. Step 3: Cross multiply
    1,582.20x = 2,181.40 × 1,021.68
  4. Step 4: Simplify right side
    1,582.20x = 2,228,690.20
  5. Step 5: Solve for x
    x = 2,228,690.20/1,582.20
  6. Step 6: Final answer
    x = 1,408.60

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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.