Home / 2,805.48-4,208.86-1,985.36

Finding the Fourth Proportional to 2,805.48, 4,208.86 and 1,985.36

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Solution

The fourth proportional to 2,805.48, 4,208.86 and 1,985.36 is: 2,978.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.48 : 4,208.86 = 1,985.36 : x
  2. Step 2: Convert to fraction form
    2,805.48/4,208.86 = 1,985.36/x
  3. Step 3: Cross multiply
    2,805.48x = 4,208.86 × 1,985.36
  4. Step 4: Simplify right side
    2,805.48x = 8,356,102.29
  5. Step 5: Solve for x
    x = 8,356,102.29/2,805.48
  6. Step 6: Final answer
    x = 2,978.49

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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.