Home / 2,980.64-4,114.32-2,281.12

Finding the Fourth Proportional to 2,980.64, 4,114.32 and 2,281.12

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Solution

The fourth proportional to 2,980.64, 4,114.32 and 2,281.12 is: 3,148.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.64 : 4,114.32 = 2,281.12 : x
  2. Step 2: Convert to fraction form
    2,980.64/4,114.32 = 2,281.12/x
  3. Step 3: Cross multiply
    2,980.64x = 4,114.32 × 2,281.12
  4. Step 4: Simplify right side
    2,980.64x = 9,385,257.64
  5. Step 5: Solve for x
    x = 9,385,257.64/2,980.64
  6. Step 6: Final answer
    x = 3,148.74

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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.