Home / 2,385.94-3,290.64-1,680.12

Finding the Fourth Proportional to 2,385.94, 3,290.64 and 1,680.12

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Solution

The fourth proportional to 2,385.94, 3,290.64 and 1,680.12 is: 2,317.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.94 : 3,290.64 = 1,680.12 : x
  2. Step 2: Convert to fraction form
    2,385.94/3,290.64 = 1,680.12/x
  3. Step 3: Cross multiply
    2,385.94x = 3,290.64 × 1,680.12
  4. Step 4: Simplify right side
    2,385.94x = 5,528,670.08
  5. Step 5: Solve for x
    x = 5,528,670.08/2,385.94
  6. Step 6: Final answer
    x = 2,317.19

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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.