Home / 1,511.25-2,084.81-1,069.40

Finding the Fourth Proportional to 1,511.25, 2,084.81 and 1,069.40

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Solution

The fourth proportional to 1,511.25, 2,084.81 and 1,069.40 is: 1,475.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.25 : 2,084.81 = 1,069.40 : x
  2. Step 2: Convert to fraction form
    1,511.25/2,084.81 = 1,069.40/x
  3. Step 3: Cross multiply
    1,511.25x = 2,084.81 × 1,069.40
  4. Step 4: Simplify right side
    1,511.25x = 2,229,480.04
  5. Step 5: Solve for x
    x = 2,229,480.04/1,511.25
  6. Step 6: Final answer
    x = 1,475.26

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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.