Home / 2,106.14-2,905.18-1,358.90

Finding the Fourth Proportional to 2,106.14, 2,905.18 and 1,358.90

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Solution

The fourth proportional to 2,106.14, 2,905.18 and 1,358.90 is: 1,874.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.14 : 2,905.18 = 1,358.90 : x
  2. Step 2: Convert to fraction form
    2,106.14/2,905.18 = 1,358.90/x
  3. Step 3: Cross multiply
    2,106.14x = 2,905.18 × 1,358.90
  4. Step 4: Simplify right side
    2,106.14x = 3,947,849.10
  5. Step 5: Solve for x
    x = 3,947,849.10/2,106.14
  6. Step 6: Final answer
    x = 1,874.45

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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.