Home / 3,119.17-4,678.80-1,270.30

Finding the Fourth Proportional to 3,119.17, 4,678.80 and 1,270.30

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Solution

The fourth proportional to 3,119.17, 4,678.80 and 1,270.30 is: 1,905.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.17 : 4,678.80 = 1,270.30 : x
  2. Step 2: Convert to fraction form
    3,119.17/4,678.80 = 1,270.30/x
  3. Step 3: Cross multiply
    3,119.17x = 4,678.80 × 1,270.30
  4. Step 4: Simplify right side
    3,119.17x = 5,943,479.64
  5. Step 5: Solve for x
    x = 5,943,479.64/3,119.17
  6. Step 6: Final answer
    x = 1,905.47

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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.