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Finding the Fourth Proportional to 644,586.80, 889,545.64 and 354,196

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Solution

The fourth proportional to 644,586.80, 889,545.64 and 354,196 is: 488,799.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,586.80 : 889,545.64 = 354,196 : x
  2. Step 2: Convert to fraction form
    644,586.80/889,545.64 = 354,196/x
  3. Step 3: Cross multiply
    644,586.80x = 889,545.64 × 354,196
  4. Step 4: Simplify right side
    644,586.80x = 315,073,507,505.44
  5. Step 5: Solve for x
    x = 315,073,507,505.44/644,586.80
  6. Step 6: Final answer
    x = 488,799.19

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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.