Home / 1,642.74-2,262.60-1,421.70

Finding the Fourth Proportional to 1,642.74, 2,262.60 and 1,421.70

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Solution

The fourth proportional to 1,642.74, 2,262.60 and 1,421.70 is: 1,958.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.74 : 2,262.60 = 1,421.70 : x
  2. Step 2: Convert to fraction form
    1,642.74/2,262.60 = 1,421.70/x
  3. Step 3: Cross multiply
    1,642.74x = 2,262.60 × 1,421.70
  4. Step 4: Simplify right side
    1,642.74x = 3,216,738.42
  5. Step 5: Solve for x
    x = 3,216,738.42/1,642.74
  6. Step 6: Final answer
    x = 1,958.15

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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.