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Finding the Fourth Proportional to 279,581.79, 385,809.16 and 158,706.92

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Solution

The fourth proportional to 279,581.79, 385,809.16 and 158,706.92 is: 219,007.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,581.79 : 385,809.16 = 158,706.92 : x
  2. Step 2: Convert to fraction form
    279,581.79/385,809.16 = 158,706.92/x
  3. Step 3: Cross multiply
    279,581.79x = 385,809.16 × 158,706.92
  4. Step 4: Simplify right side
    279,581.79x = 61,230,583,491.39
  5. Step 5: Solve for x
    x = 61,230,583,491.39/279,581.79
  6. Step 6: Final answer
    x = 219,007.77

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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.