Home / 2,485.86-3,430.68-1,645.11

Finding the Fourth Proportional to 2,485.86, 3,430.68 and 1,645.11

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Solution

The fourth proportional to 2,485.86, 3,430.68 and 1,645.11 is: 2,270.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.86 : 3,430.68 = 1,645.11 : x
  2. Step 2: Convert to fraction form
    2,485.86/3,430.68 = 1,645.11/x
  3. Step 3: Cross multiply
    2,485.86x = 3,430.68 × 1,645.11
  4. Step 4: Simplify right side
    2,485.86x = 5,643,845.97
  5. Step 5: Solve for x
    x = 5,643,845.97/2,485.86
  6. Step 6: Final answer
    x = 2,270.38

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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.