Home / 2,485.85-3,430.65-1,645.09

Finding the Fourth Proportional to 2,485.85, 3,430.65 and 1,645.09

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Solution

The fourth proportional to 2,485.85, 3,430.65 and 1,645.09 is: 2,270.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.85 : 3,430.65 = 1,645.09 : x
  2. Step 2: Convert to fraction form
    2,485.85/3,430.65 = 1,645.09/x
  3. Step 3: Cross multiply
    2,485.85x = 3,430.65 × 1,645.09
  4. Step 4: Simplify right side
    2,485.85x = 5,643,710.86
  5. Step 5: Solve for x
    x = 5,643,710.86/2,485.85
  6. Step 6: Final answer
    x = 2,270.33

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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.