Home / 3,118.35-4,678.31-927.08

Finding the Fourth Proportional to 3,118.35, 4,678.31 and 927.08

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Solution

The fourth proportional to 3,118.35, 4,678.31 and 927.08 is: 1,390.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.35 : 4,678.31 = 927.08 : x
  2. Step 2: Convert to fraction form
    3,118.35/4,678.31 = 927.08/x
  3. Step 3: Cross multiply
    3,118.35x = 4,678.31 × 927.08
  4. Step 4: Simplify right side
    3,118.35x = 4,337,158.89
  5. Step 5: Solve for x
    x = 4,337,158.89/3,118.35
  6. Step 6: Final answer
    x = 1,390.85

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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.