Home / 4,085.64-6,128.82-1,312.38

Finding the Fourth Proportional to 4,085.64, 6,128.82 and 1,312.38

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Solution

The fourth proportional to 4,085.64, 6,128.82 and 1,312.38 is: 1,968.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,085.64 : 6,128.82 = 1,312.38 : x
  2. Step 2: Convert to fraction form
    4,085.64/6,128.82 = 1,312.38/x
  3. Step 3: Cross multiply
    4,085.64x = 6,128.82 × 1,312.38
  4. Step 4: Simplify right side
    4,085.64x = 8,043,340.79
  5. Step 5: Solve for x
    x = 8,043,340.79/4,085.64
  6. Step 6: Final answer
    x = 1,968.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.