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Finding the Fourth Proportional to 289,739.40, 434,609.10 and 254,718.60

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Solution

The fourth proportional to 289,739.40, 434,609.10 and 254,718.60 is: 382,077.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,739.40 : 434,609.10 = 254,718.60 : x
  2. Step 2: Convert to fraction form
    289,739.40/434,609.10 = 254,718.60/x
  3. Step 3: Cross multiply
    289,739.40x = 434,609.10 × 254,718.60
  4. Step 4: Simplify right side
    289,739.40x = 110,703,021,499.26
  5. Step 5: Solve for x
    x = 110,703,021,499.26/289,739.40
  6. Step 6: Final answer
    x = 382,077.90

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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.