Home / 1,918.56-2,877.75-619.86

Finding the Fourth Proportional to 1,918.56, 2,877.75 and 619.86

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Solution

The fourth proportional to 1,918.56, 2,877.75 and 619.86 is: 929.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.56 : 2,877.75 = 619.86 : x
  2. Step 2: Convert to fraction form
    1,918.56/2,877.75 = 619.86/x
  3. Step 3: Cross multiply
    1,918.56x = 2,877.75 × 619.86
  4. Step 4: Simplify right side
    1,918.56x = 1,783,802.12
  5. Step 5: Solve for x
    x = 1,783,802.12/1,918.56
  6. Step 6: Final answer
    x = 929.76

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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.