Home / 3,528.40-5,287.80-2,880.40

Finding the Fourth Proportional to 3,528.40, 5,287.80 and 2,880.40

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Solution

The fourth proportional to 3,528.40, 5,287.80 and 2,880.40 is: 4,316.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,528.40 : 5,287.80 = 2,880.40 : x
  2. Step 2: Convert to fraction form
    3,528.40/5,287.80 = 2,880.40/x
  3. Step 3: Cross multiply
    3,528.40x = 5,287.80 × 2,880.40
  4. Step 4: Simplify right side
    3,528.40x = 15,230,979.12
  5. Step 5: Solve for x
    x = 15,230,979.12/3,528.40
  6. Step 6: Final answer
    x = 4,316.68

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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.