Home / 1,640.24-2,265.36-1,271.67

Finding the Fourth Proportional to 1,640.24, 2,265.36 and 1,271.67

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Solution

The fourth proportional to 1,640.24, 2,265.36 and 1,271.67 is: 1,756.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.24 : 2,265.36 = 1,271.67 : x
  2. Step 2: Convert to fraction form
    1,640.24/2,265.36 = 1,271.67/x
  3. Step 3: Cross multiply
    1,640.24x = 2,265.36 × 1,271.67
  4. Step 4: Simplify right side
    1,640.24x = 2,880,790.35
  5. Step 5: Solve for x
    x = 2,880,790.35/1,640.24
  6. Step 6: Final answer
    x = 1,756.32

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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.