Home / 3,012.32-4,518.52-1,978.90

Finding the Fourth Proportional to 3,012.32, 4,518.52 and 1,978.90

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Solution

The fourth proportional to 3,012.32, 4,518.52 and 1,978.90 is: 2,968.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012.32 : 4,518.52 = 1,978.90 : x
  2. Step 2: Convert to fraction form
    3,012.32/4,518.52 = 1,978.90/x
  3. Step 3: Cross multiply
    3,012.32x = 4,518.52 × 1,978.90
  4. Step 4: Simplify right side
    3,012.32x = 8,941,699.23
  5. Step 5: Solve for x
    x = 8,941,699.23/3,012.32
  6. Step 6: Final answer
    x = 2,968.38

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1.5x scale

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.