Home / 3,280.32-4,920.48-1,330.40

Finding the Fourth Proportional to 3,280.32, 4,920.48 and 1,330.40

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Solution

The fourth proportional to 3,280.32, 4,920.48 and 1,330.40 is: 1,995.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.32 : 4,920.48 = 1,330.40 : x
  2. Step 2: Convert to fraction form
    3,280.32/4,920.48 = 1,330.40/x
  3. Step 3: Cross multiply
    3,280.32x = 4,920.48 × 1,330.40
  4. Step 4: Simplify right side
    3,280.32x = 6,546,206.59
  5. Step 5: Solve for x
    x = 6,546,206.59/3,280.32
  6. Step 6: Final answer
    x = 1,995.60

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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.