Home / 1,185.40-1,635.60-743.32

Finding the Fourth Proportional to 1,185.40, 1,635.60 and 743.32

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Solution

The fourth proportional to 1,185.40, 1,635.60 and 743.32 is: 1,025.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.40 : 1,635.60 = 743.32 : x
  2. Step 2: Convert to fraction form
    1,185.40/1,635.60 = 743.32/x
  3. Step 3: Cross multiply
    1,185.40x = 1,635.60 × 743.32
  4. Step 4: Simplify right side
    1,185.40x = 1,215,774.19
  5. Step 5: Solve for x
    x = 1,215,774.19/1,185.40
  6. Step 6: Final answer
    x = 1,025.62

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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.