Home / 393,919.74-543,554.55-221,808.78

Finding the Fourth Proportional to 393,919.74, 543,554.55 and 221,808.78

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Solution

The fourth proportional to 393,919.74, 543,554.55 and 221,808.78 is: 306,065.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,919.74 : 543,554.55 = 221,808.78 : x
  2. Step 2: Convert to fraction form
    393,919.74/543,554.55 = 221,808.78/x
  3. Step 3: Cross multiply
    393,919.74x = 543,554.55 × 221,808.78
  4. Step 4: Simplify right side
    393,919.74x = 120,565,171,598.95
  5. Step 5: Solve for x
    x = 120,565,171,598.95/393,919.74
  6. Step 6: Final answer
    x = 306,065.32

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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.