Home / 3,178.30-4,767.63-987.34

Finding the Fourth Proportional to 3,178.30, 4,767.63 and 987.34

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Solution

The fourth proportional to 3,178.30, 4,767.63 and 987.34 is: 1,481.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.30 : 4,767.63 = 987.34 : x
  2. Step 2: Convert to fraction form
    3,178.30/4,767.63 = 987.34/x
  3. Step 3: Cross multiply
    3,178.30x = 4,767.63 × 987.34
  4. Step 4: Simplify right side
    3,178.30x = 4,707,271.80
  5. Step 5: Solve for x
    x = 4,707,271.80/3,178.30
  6. Step 6: Final answer
    x = 1,481.07

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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.