Home / 3,128.02-4,689.90-1,278.59

Finding the Fourth Proportional to 3,128.02, 4,689.90 and 1,278.59

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Solution

The fourth proportional to 3,128.02, 4,689.90 and 1,278.59 is: 1,917.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.02 : 4,689.90 = 1,278.59 : x
  2. Step 2: Convert to fraction form
    3,128.02/4,689.90 = 1,278.59/x
  3. Step 3: Cross multiply
    3,128.02x = 4,689.90 × 1,278.59
  4. Step 4: Simplify right side
    3,128.02x = 5,996,435.79
  5. Step 5: Solve for x
    x = 5,996,435.79/3,128.02
  6. Step 6: Final answer
    x = 1,917.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.