Home / 2,678.90-4,018.62-923.67

Finding the Fourth Proportional to 2,678.90, 4,018.62 and 923.67

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Solution

The fourth proportional to 2,678.90, 4,018.62 and 923.67 is: 1,385.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.90 : 4,018.62 = 923.67 : x
  2. Step 2: Convert to fraction form
    2,678.90/4,018.62 = 923.67/x
  3. Step 3: Cross multiply
    2,678.90x = 4,018.62 × 923.67
  4. Step 4: Simplify right side
    2,678.90x = 3,711,878.74
  5. Step 5: Solve for x
    x = 3,711,878.74/2,678.90
  6. Step 6: Final answer
    x = 1,385.60

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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.