Home / 2,421.61-3,342.07-1,427.21

Finding the Fourth Proportional to 2,421.61, 3,342.07 and 1,427.21

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Solution

The fourth proportional to 2,421.61, 3,342.07 and 1,427.21 is: 1,969.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.61 : 3,342.07 = 1,427.21 : x
  2. Step 2: Convert to fraction form
    2,421.61/3,342.07 = 1,427.21/x
  3. Step 3: Cross multiply
    2,421.61x = 3,342.07 × 1,427.21
  4. Step 4: Simplify right side
    2,421.61x = 4,769,821.61
  5. Step 5: Solve for x
    x = 4,769,821.61/2,421.61
  6. Step 6: Final answer
    x = 1,969.69

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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.