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Finding the Fourth Proportional to 645,951.44, 891,406.32 and 355,553.48

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Solution

The fourth proportional to 645,951.44, 891,406.32 and 355,553.48 is: 490,660.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,951.44 : 891,406.32 = 355,553.48 : x
  2. Step 2: Convert to fraction form
    645,951.44/891,406.32 = 355,553.48/x
  3. Step 3: Cross multiply
    645,951.44x = 891,406.32 × 355,553.48
  4. Step 4: Simplify right side
    645,951.44x = 316,942,619,169.99
  5. Step 5: Solve for x
    x = 316,942,619,169.99/645,951.44
  6. Step 6: Final answer
    x = 490,660.13

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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.