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Finding the Fourth Proportional to 644,351.79, 889,153.40 and 372,437.29

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Solution

The fourth proportional to 644,351.79, 889,153.40 and 372,437.29 is: 513,933.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,351.79 : 889,153.40 = 372,437.29 : x
  2. Step 2: Convert to fraction form
    644,351.79/889,153.40 = 372,437.29/x
  3. Step 3: Cross multiply
    644,351.79x = 889,153.40 × 372,437.29
  4. Step 4: Simplify right side
    644,351.79x = 331,153,884,732.82
  5. Step 5: Solve for x
    x = 331,153,884,732.82/644,351.79
  6. Step 6: Final answer
    x = 513,933.37

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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.