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Finding the Fourth Proportional to 644,270.88, 889,105.86 and 357,817.80

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Solution

The fourth proportional to 644,270.88, 889,105.86 and 357,817.80 is: 493,795.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,270.88 : 889,105.86 = 357,817.80 : x
  2. Step 2: Convert to fraction form
    644,270.88/889,105.86 = 357,817.80/x
  3. Step 3: Cross multiply
    644,270.88x = 889,105.86 × 357,817.80
  4. Step 4: Simplify right side
    644,270.88x = 318,137,902,792.31
  5. Step 5: Solve for x
    x = 318,137,902,792.31/644,270.88
  6. Step 6: Final answer
    x = 493,795.25

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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.