Home / 3,128.16-4,316.88-1,801.86

Finding the Fourth Proportional to 3,128.16, 4,316.88 and 1,801.86

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Solution

The fourth proportional to 3,128.16, 4,316.88 and 1,801.86 is: 2,486.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.16 : 4,316.88 = 1,801.86 : x
  2. Step 2: Convert to fraction form
    3,128.16/4,316.88 = 1,801.86/x
  3. Step 3: Cross multiply
    3,128.16x = 4,316.88 × 1,801.86
  4. Step 4: Simplify right side
    3,128.16x = 7,778,413.40
  5. Step 5: Solve for x
    x = 7,778,413.40/3,128.16
  6. Step 6: Final answer
    x = 2,486.58

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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.