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Finding the Fourth Proportional to 348,012, 522,018 and 85,356

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Solution

The fourth proportional to 348,012, 522,018 and 85,356 is: 128,034

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,012 : 522,018 = 85,356 : x
  2. Step 2: Convert to fraction form
    348,012/522,018 = 85,356/x
  3. Step 3: Cross multiply
    348,012x = 522,018 × 85,356
  4. Step 4: Simplify right side
    348,012x = 44,557,368,408
  5. Step 5: Solve for x
    x = 44,557,368,408/348,012
  6. Step 6: Final answer
    x = 128,034

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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.