Home / 2,386.20-3,293.18-1,391.40

Finding the Fourth Proportional to 2,386.20, 3,293.18 and 1,391.40

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Solution

The fourth proportional to 2,386.20, 3,293.18 and 1,391.40 is: 1,920.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,386.20 : 3,293.18 = 1,391.40 : x
  2. Step 2: Convert to fraction form
    2,386.20/3,293.18 = 1,391.40/x
  3. Step 3: Cross multiply
    2,386.20x = 3,293.18 × 1,391.40
  4. Step 4: Simplify right side
    2,386.20x = 4,582,130.65
  5. Step 5: Solve for x
    x = 4,582,130.65/2,386.20
  6. Step 6: Final answer
    x = 1,920.26

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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.