Home / 3,119.65-4,680.15-928.60

Finding the Fourth Proportional to 3,119.65, 4,680.15 and 928.60

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Solution

The fourth proportional to 3,119.65, 4,680.15 and 928.60 is: 1,393.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.65 : 4,680.15 = 928.60 : x
  2. Step 2: Convert to fraction form
    3,119.65/4,680.15 = 928.60/x
  3. Step 3: Cross multiply
    3,119.65x = 4,680.15 × 928.60
  4. Step 4: Simplify right side
    3,119.65x = 4,345,987.29
  5. Step 5: Solve for x
    x = 4,345,987.29/3,119.65
  6. Step 6: Final answer
    x = 1,393.10

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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.