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Finding the Fourth Proportional to 290,528.40, 434,626.20 and 251,518.80

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Solution

The fourth proportional to 290,528.40, 434,626.20 and 251,518.80 is: 376,268.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,528.40 : 434,626.20 = 251,518.80 : x
  2. Step 2: Convert to fraction form
    290,528.40/434,626.20 = 251,518.80/x
  3. Step 3: Cross multiply
    290,528.40x = 434,626.20 × 251,518.80
  4. Step 4: Simplify right side
    290,528.40x = 109,316,660,272.56
  5. Step 5: Solve for x
    x = 109,316,660,272.56/290,528.40
  6. Step 6: Final answer
    x = 376,268.41

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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.