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Finding the Fourth Proportional to 428,679.33, 642,887.63 and 296,409.57

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Solution

The fourth proportional to 428,679.33, 642,887.63 and 296,409.57 is: 444,523.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,679.33 : 642,887.63 = 296,409.57 : x
  2. Step 2: Convert to fraction form
    428,679.33/642,887.63 = 296,409.57/x
  3. Step 3: Cross multiply
    428,679.33x = 642,887.63 × 296,409.57
  4. Step 4: Simplify right side
    428,679.33x = 190,558,045,966.62
  5. Step 5: Solve for x
    x = 190,558,045,966.62/428,679.33
  6. Step 6: Final answer
    x = 444,523.52

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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.