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Finding the Fourth Proportional to 644,321.90, 889,166.28 and 357,841.97

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Solution

The fourth proportional to 644,321.90, 889,166.28 and 357,841.97 is: 493,823.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,321.90 : 889,166.28 = 357,841.97 : x
  2. Step 2: Convert to fraction form
    644,321.90/889,166.28 = 357,841.97/x
  3. Step 3: Cross multiply
    644,321.90x = 889,166.28 × 357,841.97
  4. Step 4: Simplify right side
    644,321.90x = 318,181,013,292.77
  5. Step 5: Solve for x
    x = 318,181,013,292.77/644,321.90
  6. Step 6: Final answer
    x = 493,823.06

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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.