Home / 2,384.90-3,291.21-1,390.49

Finding the Fourth Proportional to 2,384.90, 3,291.21 and 1,390.49

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Solution

The fourth proportional to 2,384.90, 3,291.21 and 1,390.49 is: 1,918.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,384.90 : 3,291.21 = 1,390.49 : x
  2. Step 2: Convert to fraction form
    2,384.90/3,291.21 = 1,390.49/x
  3. Step 3: Cross multiply
    2,384.90x = 3,291.21 × 1,390.49
  4. Step 4: Simplify right side
    2,384.90x = 4,576,394.59
  5. Step 5: Solve for x
    x = 4,576,394.59/2,384.90
  6. Step 6: Final answer
    x = 1,918.90

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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.