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Finding the Fourth Proportional to 644,458.48, 889,235.46 and 372,426.68

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Solution

The fourth proportional to 644,458.48, 889,235.46 and 372,426.68 is: 513,881.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,458.48 : 889,235.46 = 372,426.68 : x
  2. Step 2: Convert to fraction form
    644,458.48/889,235.46 = 372,426.68/x
  3. Step 3: Cross multiply
    644,458.48x = 889,235.46 × 372,426.68
  4. Step 4: Simplify right side
    644,458.48x = 331,175,010,106.07
  5. Step 5: Solve for x
    x = 331,175,010,106.07/644,458.48
  6. Step 6: Final answer
    x = 513,881.07

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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.