Home / 3,390.50-4,678.90-1,993.26

Finding the Fourth Proportional to 3,390.50, 4,678.90 and 1,993.26

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Solution

The fourth proportional to 3,390.50, 4,678.90 and 1,993.26 is: 2,750.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.50 : 4,678.90 = 1,993.26 : x
  2. Step 2: Convert to fraction form
    3,390.50/4,678.90 = 1,993.26/x
  3. Step 3: Cross multiply
    3,390.50x = 4,678.90 × 1,993.26
  4. Step 4: Simplify right side
    3,390.50x = 9,326,264.21
  5. Step 5: Solve for x
    x = 9,326,264.21/3,390.50
  6. Step 6: Final answer
    x = 2,750.70

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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.