Home / 1,086.21-1,628.10-653.67

Finding the Fourth Proportional to 1,086.21, 1,628.10 and 653.67

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Solution

The fourth proportional to 1,086.21, 1,628.10 and 653.67 is: 979.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.21 : 1,628.10 = 653.67 : x
  2. Step 2: Convert to fraction form
    1,086.21/1,628.10 = 653.67/x
  3. Step 3: Cross multiply
    1,086.21x = 1,628.10 × 653.67
  4. Step 4: Simplify right side
    1,086.21x = 1,064,240.13
  5. Step 5: Solve for x
    x = 1,064,240.13/1,086.21
  6. Step 6: Final answer
    x = 979.77

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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.