Home / 3,078.60-4,248.32-1,820.06

Finding the Fourth Proportional to 3,078.60, 4,248.32 and 1,820.06

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Solution

The fourth proportional to 3,078.60, 4,248.32 and 1,820.06 is: 2,511.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.60 : 4,248.32 = 1,820.06 : x
  2. Step 2: Convert to fraction form
    3,078.60/4,248.32 = 1,820.06/x
  3. Step 3: Cross multiply
    3,078.60x = 4,248.32 × 1,820.06
  4. Step 4: Simplify right side
    3,078.60x = 7,732,197.30
  5. Step 5: Solve for x
    x = 7,732,197.30/3,078.60
  6. Step 6: Final answer
    x = 2,511.60

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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.