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Finding the Fourth Proportional to 279,621.92, 385,878.84 and 152,297.12

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Solution

The fourth proportional to 279,621.92, 385,878.84 and 152,297.12 is: 210,170.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,621.92 : 385,878.84 = 152,297.12 : x
  2. Step 2: Convert to fraction form
    279,621.92/385,878.84 = 152,297.12/x
  3. Step 3: Cross multiply
    279,621.92x = 385,878.84 × 152,297.12
  4. Step 4: Simplify right side
    279,621.92x = 58,768,236,000.94
  5. Step 5: Solve for x
    x = 58,768,236,000.94/279,621.92
  6. Step 6: Final answer
    x = 210,170.35

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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.