Home / 2,817.40-4,228.65-1,431.70

Finding the Fourth Proportional to 2,817.40, 4,228.65 and 1,431.70

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Solution

The fourth proportional to 2,817.40, 4,228.65 and 1,431.70 is: 2,148.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.40 : 4,228.65 = 1,431.70 : x
  2. Step 2: Convert to fraction form
    2,817.40/4,228.65 = 1,431.70/x
  3. Step 3: Cross multiply
    2,817.40x = 4,228.65 × 1,431.70
  4. Step 4: Simplify right side
    2,817.40x = 6,054,158.21
  5. Step 5: Solve for x
    x = 6,054,158.21/2,817.40
  6. Step 6: Final answer
    x = 2,148.85

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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.