Home / 4,280.78-6,390.19-3,699.51

Finding the Fourth Proportional to 4,280.78, 6,390.19 and 3,699.51

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Solution

The fourth proportional to 4,280.78, 6,390.19 and 3,699.51 is: 5,522.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,280.78 : 6,390.19 = 3,699.51 : x
  2. Step 2: Convert to fraction form
    4,280.78/6,390.19 = 3,699.51/x
  3. Step 3: Cross multiply
    4,280.78x = 6,390.19 × 3,699.51
  4. Step 4: Simplify right side
    4,280.78x = 23,640,571.81
  5. Step 5: Solve for x
    x = 23,640,571.81/4,280.78
  6. Step 6: Final answer
    x = 5,522.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.