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Finding the Fourth Proportional to 348,648, 522,972 and 85,992

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Solution

The fourth proportional to 348,648, 522,972 and 85,992 is: 128,988

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,648 : 522,972 = 85,992 : x
  2. Step 2: Convert to fraction form
    348,648/522,972 = 85,992/x
  3. Step 3: Cross multiply
    348,648x = 522,972 × 85,992
  4. Step 4: Simplify right side
    348,648x = 44,971,408,224
  5. Step 5: Solve for x
    x = 44,971,408,224/348,648
  6. Step 6: Final answer
    x = 128,988

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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.