Home / 1,918.54-2,877.90-620.92

Finding the Fourth Proportional to 1,918.54, 2,877.90 and 620.92

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Solution

The fourth proportional to 1,918.54, 2,877.90 and 620.92 is: 931.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.54 : 2,877.90 = 620.92 : x
  2. Step 2: Convert to fraction form
    1,918.54/2,877.90 = 620.92/x
  3. Step 3: Cross multiply
    1,918.54x = 2,877.90 × 620.92
  4. Step 4: Simplify right side
    1,918.54x = 1,786,945.67
  5. Step 5: Solve for x
    x = 1,786,945.67/1,918.54
  6. Step 6: Final answer
    x = 931.41

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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.