Home / 1,085.96-1,629.08-436.55

Finding the Fourth Proportional to 1,085.96, 1,629.08 and 436.55

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Solution

The fourth proportional to 1,085.96, 1,629.08 and 436.55 is: 654.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.96 : 1,629.08 = 436.55 : x
  2. Step 2: Convert to fraction form
    1,085.96/1,629.08 = 436.55/x
  3. Step 3: Cross multiply
    1,085.96x = 1,629.08 × 436.55
  4. Step 4: Simplify right side
    1,085.96x = 711,172.69
  5. Step 5: Solve for x
    x = 711,172.69/1,085.96
  6. Step 6: Final answer
    x = 654.88

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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.