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Finding the Fourth Proportional to 279,462.84, 385,647.12 and 152,138.54

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Solution

The fourth proportional to 279,462.84, 385,647.12 and 152,138.54 is: 209,944.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,462.84 : 385,647.12 = 152,138.54 : x
  2. Step 2: Convert to fraction form
    279,462.84/385,647.12 = 152,138.54/x
  3. Step 3: Cross multiply
    279,462.84x = 385,647.12 × 152,138.54
  4. Step 4: Simplify right side
    279,462.84x = 58,671,787,863.77
  5. Step 5: Solve for x
    x = 58,671,787,863.77/279,462.84
  6. Step 6: Final answer
    x = 209,944.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.