Home / 1,086.12-1,629.16-436.84

Finding the Fourth Proportional to 1,086.12, 1,629.16 and 436.84

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Solution

The fourth proportional to 1,086.12, 1,629.16 and 436.84 is: 655.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.12 : 1,629.16 = 436.84 : x
  2. Step 2: Convert to fraction form
    1,086.12/1,629.16 = 436.84/x
  3. Step 3: Cross multiply
    1,086.12x = 1,629.16 × 436.84
  4. Step 4: Simplify right side
    1,086.12x = 711,682.25
  5. Step 5: Solve for x
    x = 711,682.25/1,086.12
  6. Step 6: Final answer
    x = 655.25

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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.