Home / 2,415.90-3,334-1,421.24

Finding the Fourth Proportional to 2,415.90, 3,334 and 1,421.24

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Solution

The fourth proportional to 2,415.90, 3,334 and 1,421.24 is: 1,961.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.90 : 3,334 = 1,421.24 : x
  2. Step 2: Convert to fraction form
    2,415.90/3,334 = 1,421.24/x
  3. Step 3: Cross multiply
    2,415.90x = 3,334 × 1,421.24
  4. Step 4: Simplify right side
    2,415.90x = 4,738,414.16
  5. Step 5: Solve for x
    x = 4,738,414.16/2,415.90
  6. Step 6: Final answer
    x = 1,961.35

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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.