Home / 2,415.87-3,334.08-1,420.79

Finding the Fourth Proportional to 2,415.87, 3,334.08 and 1,420.79

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Solution

The fourth proportional to 2,415.87, 3,334.08 and 1,420.79 is: 1,960.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.87 : 3,334.08 = 1,420.79 : x
  2. Step 2: Convert to fraction form
    2,415.87/3,334.08 = 1,420.79/x
  3. Step 3: Cross multiply
    2,415.87x = 3,334.08 × 1,420.79
  4. Step 4: Simplify right side
    2,415.87x = 4,737,010.85
  5. Step 5: Solve for x
    x = 4,737,010.85/2,415.87
  6. Step 6: Final answer
    x = 1,960.79

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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.