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Finding the Fourth Proportional to 291,721.20, 436,890.60 and 291,721.20

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Solution

The fourth proportional to 291,721.20, 436,890.60 and 291,721.20 is: 436,890.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,721.20 : 436,890.60 = 291,721.20 : x
  2. Step 2: Convert to fraction form
    291,721.20/436,890.60 = 291,721.20/x
  3. Step 3: Cross multiply
    291,721.20x = 436,890.60 × 291,721.20
  4. Step 4: Simplify right side
    291,721.20x = 127,450,250,100.72
  5. Step 5: Solve for x
    x = 127,450,250,100.72/291,721.20
  6. Step 6: Final answer
    x = 436,890.60

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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.