Home / 3,918.48-5,407.40-2,239.76

Finding the Fourth Proportional to 3,918.48, 5,407.40 and 2,239.76

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Solution

The fourth proportional to 3,918.48, 5,407.40 and 2,239.76 is: 3,090.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.48 : 5,407.40 = 2,239.76 : x
  2. Step 2: Convert to fraction form
    3,918.48/5,407.40 = 2,239.76/x
  3. Step 3: Cross multiply
    3,918.48x = 5,407.40 × 2,239.76
  4. Step 4: Simplify right side
    3,918.48x = 12,111,239.99
  5. Step 5: Solve for x
    x = 12,111,239.99/3,918.48
  6. Step 6: Final answer
    x = 3,090.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.