Home / 3,120.02-4,677.15-1,387.70

Finding the Fourth Proportional to 3,120.02, 4,677.15 and 1,387.70

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Solution

The fourth proportional to 3,120.02, 4,677.15 and 1,387.70 is: 2,080.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.02 : 4,677.15 = 1,387.70 : x
  2. Step 2: Convert to fraction form
    3,120.02/4,677.15 = 1,387.70/x
  3. Step 3: Cross multiply
    3,120.02x = 4,677.15 × 1,387.70
  4. Step 4: Simplify right side
    3,120.02x = 6,490,481.06
  5. Step 5: Solve for x
    x = 6,490,481.06/3,120.02
  6. Step 6: Final answer
    x = 2,080.27

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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.