Home / 4,085.19-6,128.70-1,312.11

Finding the Fourth Proportional to 4,085.19, 6,128.70 and 1,312.11

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Solution

The fourth proportional to 4,085.19, 6,128.70 and 1,312.11 is: 1,968.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,085.19 : 6,128.70 = 1,312.11 : x
  2. Step 2: Convert to fraction form
    4,085.19/6,128.70 = 1,312.11/x
  3. Step 3: Cross multiply
    4,085.19x = 6,128.70 × 1,312.11
  4. Step 4: Simplify right side
    4,085.19x = 8,041,528.56
  5. Step 5: Solve for x
    x = 8,041,528.56/4,085.19
  6. Step 6: Final answer
    x = 1,968.46

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Double scale
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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.