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Finding the Fourth Proportional to 644,701.64, 889,636.14 and 372,787.11

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Solution

The fourth proportional to 644,701.64, 889,636.14 and 372,787.11 is: 514,416.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,701.64 : 889,636.14 = 372,787.11 : x
  2. Step 2: Convert to fraction form
    644,701.64/889,636.14 = 372,787.11/x
  3. Step 3: Cross multiply
    644,701.64x = 889,636.14 × 372,787.11
  4. Step 4: Simplify right side
    644,701.64x = 331,644,885,582.16
  5. Step 5: Solve for x
    x = 331,644,885,582.16/644,701.64
  6. Step 6: Final answer
    x = 514,416.08

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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.