Home / 1,509.21-2,082.63-1,011.78

Finding the Fourth Proportional to 1,509.21, 2,082.63 and 1,011.78

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Solution

The fourth proportional to 1,509.21, 2,082.63 and 1,011.78 is: 1,396.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,509.21 : 2,082.63 = 1,011.78 : x
  2. Step 2: Convert to fraction form
    1,509.21/2,082.63 = 1,011.78/x
  3. Step 3: Cross multiply
    1,509.21x = 2,082.63 × 1,011.78
  4. Step 4: Simplify right side
    1,509.21x = 2,107,163.38
  5. Step 5: Solve for x
    x = 2,107,163.38/1,509.21
  6. Step 6: Final answer
    x = 1,396.20

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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.