Home / 3,128.86-4,316.97-1,802.08

Finding the Fourth Proportional to 3,128.86, 4,316.97 and 1,802.08

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Solution

The fourth proportional to 3,128.86, 4,316.97 and 1,802.08 is: 2,486.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.86 : 4,316.97 = 1,802.08 : x
  2. Step 2: Convert to fraction form
    3,128.86/4,316.97 = 1,802.08/x
  3. Step 3: Cross multiply
    3,128.86x = 4,316.97 × 1,802.08
  4. Step 4: Simplify right side
    3,128.86x = 7,779,525.30
  5. Step 5: Solve for x
    x = 7,779,525.30/3,128.86
  6. Step 6: Final answer
    x = 2,486.38

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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.