Home / 393,955.22-543,598.20-221,864.17

Finding the Fourth Proportional to 393,955.22, 543,598.20 and 221,864.17

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Solution

The fourth proportional to 393,955.22, 543,598.20 and 221,864.17 is: 306,138.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,955.22 : 543,598.20 = 221,864.17 : x
  2. Step 2: Convert to fraction form
    393,955.22/543,598.20 = 221,864.17/x
  3. Step 3: Cross multiply
    393,955.22x = 543,598.20 × 221,864.17
  4. Step 4: Simplify right side
    393,955.22x = 120,604,962,097.50
  5. Step 5: Solve for x
    x = 120,604,962,097.50/393,955.22
  6. Step 6: Final answer
    x = 306,138.76

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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.