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Finding the Fourth Proportional to 442,911.20, 618,676 and 442,911.20

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Solution

The fourth proportional to 442,911.20, 618,676 and 442,911.20 is: 618,676

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,911.20 : 618,676 = 442,911.20 : x
  2. Step 2: Convert to fraction form
    442,911.20/618,676 = 442,911.20/x
  3. Step 3: Cross multiply
    442,911.20x = 618,676 × 442,911.20
  4. Step 4: Simplify right side
    442,911.20x = 274,018,529,571.20
  5. Step 5: Solve for x
    x = 274,018,529,571.20/442,911.20
  6. Step 6: Final answer
    x = 618,676

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.