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Finding the Fourth Proportional to 279,486.72, 385,678.80 and 152,161.92

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Solution

The fourth proportional to 279,486.72, 385,678.80 and 152,161.92 is: 209,976.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,486.72 : 385,678.80 = 152,161.92 : x
  2. Step 2: Convert to fraction form
    279,486.72/385,678.80 = 152,161.92/x
  3. Step 3: Cross multiply
    279,486.72x = 385,678.80 × 152,161.92
  4. Step 4: Simplify right side
    279,486.72x = 58,685,626,711.30
  5. Step 5: Solve for x
    x = 58,685,626,711.30/279,486.72
  6. Step 6: Final answer
    x = 209,976.44

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1.5x scale

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.