Home / 1,917.09-2,875.19-618.30

Finding the Fourth Proportional to 1,917.09, 2,875.19 and 618.30

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Solution

The fourth proportional to 1,917.09, 2,875.19 and 618.30 is: 927.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.09 : 2,875.19 = 618.30 : x
  2. Step 2: Convert to fraction form
    1,917.09/2,875.19 = 618.30/x
  3. Step 3: Cross multiply
    1,917.09x = 2,875.19 × 618.30
  4. Step 4: Simplify right side
    1,917.09x = 1,777,726.89
  5. Step 5: Solve for x
    x = 1,777,726.89/1,917.09
  6. Step 6: Final answer
    x = 927.30

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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.