Home / 1,905.35-2,860.61-1,318.95

Finding the Fourth Proportional to 1,905.35, 2,860.61 and 1,318.95

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Solution

The fourth proportional to 1,905.35, 2,860.61 and 1,318.95 is: 1,980.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.35 : 2,860.61 = 1,318.95 : x
  2. Step 2: Convert to fraction form
    1,905.35/2,860.61 = 1,318.95/x
  3. Step 3: Cross multiply
    1,905.35x = 2,860.61 × 1,318.95
  4. Step 4: Simplify right side
    1,905.35x = 3,772,994.96
  5. Step 5: Solve for x
    x = 3,772,994.96/1,905.35
  6. Step 6: Final answer
    x = 1,980.22

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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.