Home / 1,087.21-1,629.60-654.67

Finding the Fourth Proportional to 1,087.21, 1,629.60 and 654.67

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Solution

The fourth proportional to 1,087.21, 1,629.60 and 654.67 is: 981.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.21 : 1,629.60 = 654.67 : x
  2. Step 2: Convert to fraction form
    1,087.21/1,629.60 = 654.67/x
  3. Step 3: Cross multiply
    1,087.21x = 1,629.60 × 654.67
  4. Step 4: Simplify right side
    1,087.21x = 1,066,850.23
  5. Step 5: Solve for x
    x = 1,066,850.23/1,087.21
  6. Step 6: Final answer
    x = 981.27

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1.5x scale

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.