Home / 3,578.86-4,939.06-1,985.69

Finding the Fourth Proportional to 3,578.86, 4,939.06 and 1,985.69

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Solution

The fourth proportional to 3,578.86, 4,939.06 and 1,985.69 is: 2,740.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.86 : 4,939.06 = 1,985.69 : x
  2. Step 2: Convert to fraction form
    3,578.86/4,939.06 = 1,985.69/x
  3. Step 3: Cross multiply
    3,578.86x = 4,939.06 × 1,985.69
  4. Step 4: Simplify right side
    3,578.86x = 9,807,442.05
  5. Step 5: Solve for x
    x = 9,807,442.05/3,578.86
  6. Step 6: Final answer
    x = 2,740.38

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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.