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Finding the Fourth Proportional to 644,548.54, 889,532.18 and 358,087.08

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Solution

The fourth proportional to 644,548.54, 889,532.18 and 358,087.08 is: 494,190.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,548.54 : 889,532.18 = 358,087.08 : x
  2. Step 2: Convert to fraction form
    644,548.54/889,532.18 = 358,087.08/x
  3. Step 3: Cross multiply
    644,548.54x = 889,532.18 × 358,087.08
  4. Step 4: Simplify right side
    644,548.54x = 318,529,978,786.75
  5. Step 5: Solve for x
    x = 318,529,978,786.75/644,548.54
  6. Step 6: Final answer
    x = 494,190.83

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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.