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Finding the Fourth Proportional to 644,963.60, 889,801.62 and 415,503.56

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Solution

The fourth proportional to 644,963.60, 889,801.62 and 415,503.56 is: 573,235.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,963.60 : 889,801.62 = 415,503.56 : x
  2. Step 2: Convert to fraction form
    644,963.60/889,801.62 = 415,503.56/x
  3. Step 3: Cross multiply
    644,963.60x = 889,801.62 × 415,503.56
  4. Step 4: Simplify right side
    644,963.60x = 369,715,740,803.77
  5. Step 5: Solve for x
    x = 369,715,740,803.77/644,963.60
  6. Step 6: Final answer
    x = 573,235.05

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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.