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Finding the Fourth Proportional to 290,530.92, 436,529.34 and 278,721.64

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Solution

The fourth proportional to 290,530.92, 436,529.34 and 278,721.64 is: 418,785.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,530.92 : 436,529.34 = 278,721.64 : x
  2. Step 2: Convert to fraction form
    290,530.92/436,529.34 = 278,721.64/x
  3. Step 3: Cross multiply
    290,530.92x = 436,529.34 × 278,721.64
  4. Step 4: Simplify right side
    290,530.92x = 121,670,173,552.92
  5. Step 5: Solve for x
    x = 121,670,173,552.92/290,530.92
  6. Step 6: Final answer
    x = 418,785.63

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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.