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Finding the Fourth Proportional to 644,321.40, 889,165.59 and 357,841.47

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Solution

The fourth proportional to 644,321.40, 889,165.59 and 357,841.47 is: 493,822.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,321.40 : 889,165.59 = 357,841.47 : x
  2. Step 2: Convert to fraction form
    644,321.40/889,165.59 = 357,841.47/x
  3. Step 3: Cross multiply
    644,321.40x = 889,165.59 × 357,841.47
  4. Step 4: Simplify right side
    644,321.40x = 318,180,321,799.02
  5. Step 5: Solve for x
    x = 318,180,321,799.02/644,321.40
  6. Step 6: Final answer
    x = 493,822.37

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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.