Home / 1,386.41-2,069.69-1,285.16

Finding the Fourth Proportional to 1,386.41, 2,069.69 and 1,285.16

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Solution

The fourth proportional to 1,386.41, 2,069.69 and 1,285.16 is: 1,918.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.41 : 2,069.69 = 1,285.16 : x
  2. Step 2: Convert to fraction form
    1,386.41/2,069.69 = 1,285.16/x
  3. Step 3: Cross multiply
    1,386.41x = 2,069.69 × 1,285.16
  4. Step 4: Simplify right side
    1,386.41x = 2,659,882.80
  5. Step 5: Solve for x
    x = 2,659,882.80/1,386.41
  6. Step 6: Final answer
    x = 1,918.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.