Home / 428,279.84-643,008.24-218,059.04

Finding the Fourth Proportional to 428,279.84, 643,008.24 and 218,059.04

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Solution

The fourth proportional to 428,279.84, 643,008.24 and 218,059.04 is: 327,388.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,279.84 : 643,008.24 = 218,059.04 : x
  2. Step 2: Convert to fraction form
    428,279.84/643,008.24 = 218,059.04/x
  3. Step 3: Cross multiply
    428,279.84x = 643,008.24 × 218,059.04
  4. Step 4: Simplify right side
    428,279.84x = 140,213,759,526.49
  5. Step 5: Solve for x
    x = 140,213,759,526.49/428,279.84
  6. Step 6: Final answer
    x = 327,388.19

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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.