Home / 3,152.20-4,728.80-1,072.40

Finding the Fourth Proportional to 3,152.20, 4,728.80 and 1,072.40

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Solution

The fourth proportional to 3,152.20, 4,728.80 and 1,072.40 is: 1,608.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,152.20 : 4,728.80 = 1,072.40 : x
  2. Step 2: Convert to fraction form
    3,152.20/4,728.80 = 1,072.40/x
  3. Step 3: Cross multiply
    3,152.20x = 4,728.80 × 1,072.40
  4. Step 4: Simplify right side
    3,152.20x = 5,071,165.12
  5. Step 5: Solve for x
    x = 5,071,165.12/3,152.20
  6. Step 6: Final answer
    x = 1,608.77

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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.