Home / 1,619.76-2,235.54-911.93

Finding the Fourth Proportional to 1,619.76, 2,235.54 and 911.93

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Solution

The fourth proportional to 1,619.76, 2,235.54 and 911.93 is: 1,258.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.76 : 2,235.54 = 911.93 : x
  2. Step 2: Convert to fraction form
    1,619.76/2,235.54 = 911.93/x
  3. Step 3: Cross multiply
    1,619.76x = 2,235.54 × 911.93
  4. Step 4: Simplify right side
    1,619.76x = 2,038,644.81
  5. Step 5: Solve for x
    x = 2,038,644.81/1,619.76
  6. Step 6: Final answer
    x = 1,258.61

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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.