Home / 2,920.90-4,030.81-1,801.39

Finding the Fourth Proportional to 2,920.90, 4,030.81 and 1,801.39

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Solution

The fourth proportional to 2,920.90, 4,030.81 and 1,801.39 is: 2,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.90 : 4,030.81 = 1,801.39 : x
  2. Step 2: Convert to fraction form
    2,920.90/4,030.81 = 1,801.39/x
  3. Step 3: Cross multiply
    2,920.90x = 4,030.81 × 1,801.39
  4. Step 4: Simplify right side
    2,920.90x = 7,261,060.83
  5. Step 5: Solve for x
    x = 7,261,060.83/2,920.90
  6. Step 6: Final answer
    x = 2,485.90

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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.