Home / 1,918.74-2,878.59-620.34

Finding the Fourth Proportional to 1,918.74, 2,878.59 and 620.34

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Solution

The fourth proportional to 1,918.74, 2,878.59 and 620.34 is: 930.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.74 : 2,878.59 = 620.34 : x
  2. Step 2: Convert to fraction form
    1,918.74/2,878.59 = 620.34/x
  3. Step 3: Cross multiply
    1,918.74x = 2,878.59 × 620.34
  4. Step 4: Simplify right side
    1,918.74x = 1,785,704.52
  5. Step 5: Solve for x
    x = 1,785,704.52/1,918.74
  6. Step 6: Final answer
    x = 930.67

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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.