Home / 3,578.78-4,938.31-1,985.38

Finding the Fourth Proportional to 3,578.78, 4,938.31 and 1,985.38

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Solution

The fourth proportional to 3,578.78, 4,938.31 and 1,985.38 is: 2,739.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.78 : 4,938.31 = 1,985.38 : x
  2. Step 2: Convert to fraction form
    3,578.78/4,938.31 = 1,985.38/x
  3. Step 3: Cross multiply
    3,578.78x = 4,938.31 × 1,985.38
  4. Step 4: Simplify right side
    3,578.78x = 9,804,421.91
  5. Step 5: Solve for x
    x = 9,804,421.91/3,578.78
  6. Step 6: Final answer
    x = 2,739.60

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1.5x scale

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.