Home / 1,639.36-2,262.18-1,285.60

Finding the Fourth Proportional to 1,639.36, 2,262.18 and 1,285.60

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Solution

The fourth proportional to 1,639.36, 2,262.18 and 1,285.60 is: 1,774.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.36 : 2,262.18 = 1,285.60 : x
  2. Step 2: Convert to fraction form
    1,639.36/2,262.18 = 1,285.60/x
  3. Step 3: Cross multiply
    1,639.36x = 2,262.18 × 1,285.60
  4. Step 4: Simplify right side
    1,639.36x = 2,908,258.61
  5. Step 5: Solve for x
    x = 2,908,258.61/1,639.36
  6. Step 6: Final answer
    x = 1,774.02

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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.