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Finding the Fourth Proportional to 644,991.07, 890,088.25 and 354,607.58

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Solution

The fourth proportional to 644,991.07, 890,088.25 and 354,607.58 is: 489,358.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,991.07 : 890,088.25 = 354,607.58 : x
  2. Step 2: Convert to fraction form
    644,991.07/890,088.25 = 354,607.58/x
  3. Step 3: Cross multiply
    644,991.07x = 890,088.25 × 354,607.58
  4. Step 4: Simplify right side
    644,991.07x = 315,632,040,160.08
  5. Step 5: Solve for x
    x = 315,632,040,160.08/644,991.07
  6. Step 6: Final answer
    x = 489,358.77

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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.