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Finding the Fourth Proportional to 644,772.96, 889,794.74 and 354,416.22

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Solution

The fourth proportional to 644,772.96, 889,794.74 and 354,416.22 is: 489,098.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,772.96 : 889,794.74 = 354,416.22 : x
  2. Step 2: Convert to fraction form
    644,772.96/889,794.74 = 354,416.22/x
  3. Step 3: Cross multiply
    644,772.96x = 889,794.74 × 354,416.22
  4. Step 4: Simplify right side
    644,772.96x = 315,357,689,212.72
  5. Step 5: Solve for x
    x = 315,357,689,212.72/644,772.96
  6. Step 6: Final answer
    x = 489,098.81

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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.