Home / 2,815.68-4,220.17-1,312.67

Finding the Fourth Proportional to 2,815.68, 4,220.17 and 1,312.67

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Solution

The fourth proportional to 2,815.68, 4,220.17 and 1,312.67 is: 1,967.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.68 : 4,220.17 = 1,312.67 : x
  2. Step 2: Convert to fraction form
    2,815.68/4,220.17 = 1,312.67/x
  3. Step 3: Cross multiply
    2,815.68x = 4,220.17 × 1,312.67
  4. Step 4: Simplify right side
    2,815.68x = 5,539,690.55
  5. Step 5: Solve for x
    x = 5,539,690.55/2,815.68
  6. Step 6: Final answer
    x = 1,967.44

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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.