Home / 4,085.78-6,128.70-1,007.78

Finding the Fourth Proportional to 4,085.78, 6,128.70 and 1,007.78

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Solution

The fourth proportional to 4,085.78, 6,128.70 and 1,007.78 is: 1,511.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,085.78 : 6,128.70 = 1,007.78 : x
  2. Step 2: Convert to fraction form
    4,085.78/6,128.70 = 1,007.78/x
  3. Step 3: Cross multiply
    4,085.78x = 6,128.70 × 1,007.78
  4. Step 4: Simplify right side
    4,085.78x = 6,176,381.29
  5. Step 5: Solve for x
    x = 6,176,381.29/4,085.78
  6. Step 6: Final answer
    x = 1,511.68

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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.