Home / 2,870.25-3,960.95-1,628.25

Finding the Fourth Proportional to 2,870.25, 3,960.95 and 1,628.25

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Solution

The fourth proportional to 2,870.25, 3,960.95 and 1,628.25 is: 2,246.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,870.25 : 3,960.95 = 1,628.25 : x
  2. Step 2: Convert to fraction form
    2,870.25/3,960.95 = 1,628.25/x
  3. Step 3: Cross multiply
    2,870.25x = 3,960.95 × 1,628.25
  4. Step 4: Simplify right side
    2,870.25x = 6,449,408.70
  5. Step 5: Solve for x
    x = 6,449,408.70/2,870.25
  6. Step 6: Final answer
    x = 2,246.99

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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.