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Finding the Fourth Proportional to 644,423.73, 889,318.84 and 354,039.04

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Solution

The fourth proportional to 644,423.73, 889,318.84 and 354,039.04 is: 488,581.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,423.73 : 889,318.84 = 354,039.04 : x
  2. Step 2: Convert to fraction form
    644,423.73/889,318.84 = 354,039.04/x
  3. Step 3: Cross multiply
    644,423.73x = 889,318.84 × 354,039.04
  4. Step 4: Simplify right side
    644,423.73x = 314,853,585,259.12
  5. Step 5: Solve for x
    x = 314,853,585,259.12/644,423.73
  6. Step 6: Final answer
    x = 488,581.61

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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.