Home / 1,918.85-2,877.33-620.15

Finding the Fourth Proportional to 1,918.85, 2,877.33 and 620.15

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Solution

The fourth proportional to 1,918.85, 2,877.33 and 620.15 is: 929.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.85 : 2,877.33 = 620.15 : x
  2. Step 2: Convert to fraction form
    1,918.85/2,877.33 = 620.15/x
  3. Step 3: Cross multiply
    1,918.85x = 2,877.33 × 620.15
  4. Step 4: Simplify right side
    1,918.85x = 1,784,376.20
  5. Step 5: Solve for x
    x = 1,784,376.20/1,918.85
  6. Step 6: Final answer
    x = 929.92

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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.