Home / 1,938.95-2,905.32-1,887.70

Finding the Fourth Proportional to 1,938.95, 2,905.32 and 1,887.70

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Solution

The fourth proportional to 1,938.95, 2,905.32 and 1,887.70 is: 2,828.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.95 : 2,905.32 = 1,887.70 : x
  2. Step 2: Convert to fraction form
    1,938.95/2,905.32 = 1,887.70/x
  3. Step 3: Cross multiply
    1,938.95x = 2,905.32 × 1,887.70
  4. Step 4: Simplify right side
    1,938.95x = 5,484,358.04
  5. Step 5: Solve for x
    x = 5,484,358.04/1,938.95
  6. Step 6: Final answer
    x = 2,828.52

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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.