Home / 3,119.14-4,678.73-928.05

Finding the Fourth Proportional to 3,119.14, 4,678.73 and 928.05

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Solution

The fourth proportional to 3,119.14, 4,678.73 and 928.05 is: 1,392.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.14 : 4,678.73 = 928.05 : x
  2. Step 2: Convert to fraction form
    3,119.14/4,678.73 = 928.05/x
  3. Step 3: Cross multiply
    3,119.14x = 4,678.73 × 928.05
  4. Step 4: Simplify right side
    3,119.14x = 4,342,095.38
  5. Step 5: Solve for x
    x = 4,342,095.38/3,119.14
  6. Step 6: Final answer
    x = 1,392.08

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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.