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Finding the Fourth Proportional to 279,408.80, 385,564.38 and 152,081.66

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Solution

The fourth proportional to 279,408.80, 385,564.38 and 152,081.66 is: 209,861.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,408.80 : 385,564.38 = 152,081.66 : x
  2. Step 2: Convert to fraction form
    279,408.80/385,564.38 = 152,081.66/x
  3. Step 3: Cross multiply
    279,408.80x = 385,564.38 × 152,081.66
  4. Step 4: Simplify right side
    279,408.80x = 58,637,270,947.27
  5. Step 5: Solve for x
    x = 58,637,270,947.27/279,408.80
  6. Step 6: Final answer
    x = 209,861.93

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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.