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Finding the Fourth Proportional to 303,408, 455,112 and 81,792

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Solution

The fourth proportional to 303,408, 455,112 and 81,792 is: 122,688

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,408 : 455,112 = 81,792 : x
  2. Step 2: Convert to fraction form
    303,408/455,112 = 81,792/x
  3. Step 3: Cross multiply
    303,408x = 455,112 × 81,792
  4. Step 4: Simplify right side
    303,408x = 37,224,520,704
  5. Step 5: Solve for x
    x = 37,224,520,704/303,408
  6. Step 6: Final answer
    x = 122,688

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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.