Home / 3,128.02-4,315.07-1,800.90

Finding the Fourth Proportional to 3,128.02, 4,315.07 and 1,800.90

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Solution

The fourth proportional to 3,128.02, 4,315.07 and 1,800.90 is: 2,484.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.02 : 4,315.07 = 1,800.90 : x
  2. Step 2: Convert to fraction form
    3,128.02/4,315.07 = 1,800.90/x
  3. Step 3: Cross multiply
    3,128.02x = 4,315.07 × 1,800.90
  4. Step 4: Simplify right side
    3,128.02x = 7,771,014.07
  5. Step 5: Solve for x
    x = 7,771,014.07/3,128.02
  6. Step 6: Final answer
    x = 2,484.33

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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.