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Finding the Fourth Proportional to 644,992.07, 890,089.63 and 354,608.58

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Solution

The fourth proportional to 644,992.07, 890,089.63 and 354,608.58 is: 489,360.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,992.07 : 890,089.63 = 354,608.58 : x
  2. Step 2: Convert to fraction form
    644,992.07/890,089.63 = 354,608.58/x
  3. Step 3: Cross multiply
    644,992.07x = 890,089.63 × 354,608.58
  4. Step 4: Simplify right side
    644,992.07x = 315,633,419,767.03
  5. Step 5: Solve for x
    x = 315,633,419,767.03/644,992.07
  6. Step 6: Final answer
    x = 489,360.16

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1.5x scale

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.