Home / 2,415.80-3,334.62-1,421.12

Finding the Fourth Proportional to 2,415.80, 3,334.62 and 1,421.12

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Solution

The fourth proportional to 2,415.80, 3,334.62 and 1,421.12 is: 1,961.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.80 : 3,334.62 = 1,421.12 : x
  2. Step 2: Convert to fraction form
    2,415.80/3,334.62 = 1,421.12/x
  3. Step 3: Cross multiply
    2,415.80x = 3,334.62 × 1,421.12
  4. Step 4: Simplify right side
    2,415.80x = 4,738,895.17
  5. Step 5: Solve for x
    x = 4,738,895.17/2,415.80
  6. Step 6: Final answer
    x = 1,961.63

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Double scale
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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.