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Finding the Fourth Proportional to 808,204.90, 1,212,780 and 448,678.50

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Solution

The fourth proportional to 808,204.90, 1,212,780 and 448,678.50 is: 673,280.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,204.90 : 1,212,780 = 448,678.50 : x
  2. Step 2: Convert to fraction form
    808,204.90/1,212,780 = 448,678.50/x
  3. Step 3: Cross multiply
    808,204.90x = 1,212,780 × 448,678.50
  4. Step 4: Simplify right side
    808,204.90x = 544,148,311,230
  5. Step 5: Solve for x
    x = 544,148,311,230/808,204.90
  6. Step 6: Final answer
    x = 673,280.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.