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Finding the Fourth Proportional to 290,530.40, 434,629.20 and 251,520.80

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Solution

The fourth proportional to 290,530.40, 434,629.20 and 251,520.80 is: 376,271.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,530.40 : 434,629.20 = 251,520.80 : x
  2. Step 2: Convert to fraction form
    290,530.40/434,629.20 = 251,520.80/x
  3. Step 3: Cross multiply
    290,530.40x = 434,629.20 × 251,520.80
  4. Step 4: Simplify right side
    290,530.40x = 109,318,284,087.36
  5. Step 5: Solve for x
    x = 109,318,284,087.36/290,530.40
  6. Step 6: Final answer
    x = 376,271.41

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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.