Home / 1,406.40-2,113.65-1,228.20

Finding the Fourth Proportional to 1,406.40, 2,113.65 and 1,228.20

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Solution

The fourth proportional to 1,406.40, 2,113.65 and 1,228.20 is: 1,845.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.40 : 2,113.65 = 1,228.20 : x
  2. Step 2: Convert to fraction form
    1,406.40/2,113.65 = 1,228.20/x
  3. Step 3: Cross multiply
    1,406.40x = 2,113.65 × 1,228.20
  4. Step 4: Simplify right side
    1,406.40x = 2,595,984.93
  5. Step 5: Solve for x
    x = 2,595,984.93/1,406.40
  6. Step 6: Final answer
    x = 1,845.84

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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.