Home / 2,140.36-2,954.18-1,355.40

Finding the Fourth Proportional to 2,140.36, 2,954.18 and 1,355.40

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Solution

The fourth proportional to 2,140.36, 2,954.18 and 1,355.40 is: 1,870.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.36 : 2,954.18 = 1,355.40 : x
  2. Step 2: Convert to fraction form
    2,140.36/2,954.18 = 1,355.40/x
  3. Step 3: Cross multiply
    2,140.36x = 2,954.18 × 1,355.40
  4. Step 4: Simplify right side
    2,140.36x = 4,004,095.57
  5. Step 5: Solve for x
    x = 4,004,095.57/2,140.36
  6. Step 6: Final answer
    x = 1,870.76

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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.