Home / 3,390.18-4,678.40-1,974.16

Finding the Fourth Proportional to 3,390.18, 4,678.40 and 1,974.16

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Solution

The fourth proportional to 3,390.18, 4,678.40 and 1,974.16 is: 2,724.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.18 : 4,678.40 = 1,974.16 : x
  2. Step 2: Convert to fraction form
    3,390.18/4,678.40 = 1,974.16/x
  3. Step 3: Cross multiply
    3,390.18x = 4,678.40 × 1,974.16
  4. Step 4: Simplify right side
    3,390.18x = 9,235,910.14
  5. Step 5: Solve for x
    x = 9,235,910.14/3,390.18
  6. Step 6: Final answer
    x = 2,724.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.