Home / 3,131.65-4,321.49-1,715.05

Finding the Fourth Proportional to 3,131.65, 4,321.49 and 1,715.05

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Solution

The fourth proportional to 3,131.65, 4,321.49 and 1,715.05 is: 2,366.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.65 : 4,321.49 = 1,715.05 : x
  2. Step 2: Convert to fraction form
    3,131.65/4,321.49 = 1,715.05/x
  3. Step 3: Cross multiply
    3,131.65x = 4,321.49 × 1,715.05
  4. Step 4: Simplify right side
    3,131.65x = 7,411,571.42
  5. Step 5: Solve for x
    x = 7,411,571.42/3,131.65
  6. Step 6: Final answer
    x = 2,366.67

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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.