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Finding the Fourth Proportional to 279,508.72, 385,709.16 and 152,183.92

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Solution

The fourth proportional to 279,508.72, 385,709.16 and 152,183.92 is: 210,006.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,508.72 : 385,709.16 = 152,183.92 : x
  2. Step 2: Convert to fraction form
    279,508.72/385,709.16 = 152,183.92/x
  3. Step 3: Cross multiply
    279,508.72x = 385,709.16 × 152,183.92
  4. Step 4: Simplify right side
    279,508.72x = 58,698,731,948.71
  5. Step 5: Solve for x
    x = 58,698,731,948.71/279,508.72
  6. Step 6: Final answer
    x = 210,006.80

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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.