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Finding the Fourth Proportional to 348,612, 522,918 and 85,956

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Solution

The fourth proportional to 348,612, 522,918 and 85,956 is: 128,934

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,612 : 522,918 = 85,956 : x
  2. Step 2: Convert to fraction form
    348,612/522,918 = 85,956/x
  3. Step 3: Cross multiply
    348,612x = 522,918 × 85,956
  4. Step 4: Simplify right side
    348,612x = 44,947,939,608
  5. Step 5: Solve for x
    x = 44,947,939,608/348,612
  6. Step 6: Final answer
    x = 128,934

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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.