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Finding the Fourth Proportional to 289,747.80, 434,621.70 and 270,064.80

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Solution

The fourth proportional to 289,747.80, 434,621.70 and 270,064.80 is: 405,097.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,747.80 : 434,621.70 = 270,064.80 : x
  2. Step 2: Convert to fraction form
    289,747.80/434,621.70 = 270,064.80/x
  3. Step 3: Cross multiply
    289,747.80x = 434,621.70 × 270,064.80
  4. Step 4: Simplify right side
    289,747.80x = 117,376,022,486.16
  5. Step 5: Solve for x
    x = 117,376,022,486.16/289,747.80
  6. Step 6: Final answer
    x = 405,097.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.