Home / 2,858.10-4,287.15-2,639.40

Finding the Fourth Proportional to 2,858.10, 4,287.15 and 2,639.40

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Solution

The fourth proportional to 2,858.10, 4,287.15 and 2,639.40 is: 3,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.10 : 4,287.15 = 2,639.40 : x
  2. Step 2: Convert to fraction form
    2,858.10/4,287.15 = 2,639.40/x
  3. Step 3: Cross multiply
    2,858.10x = 4,287.15 × 2,639.40
  4. Step 4: Simplify right side
    2,858.10x = 11,315,503.71
  5. Step 5: Solve for x
    x = 11,315,503.71/2,858.10
  6. Step 6: Final answer
    x = 3,959.10

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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.