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Finding the Fourth Proportional to 490,866.40, 736,731.60 and 290,936.80

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Solution

The fourth proportional to 490,866.40, 736,731.60 and 290,936.80 is: 436,661.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,866.40 : 736,731.60 = 290,936.80 : x
  2. Step 2: Convert to fraction form
    490,866.40/736,731.60 = 290,936.80/x
  3. Step 3: Cross multiply
    490,866.40x = 736,731.60 × 290,936.80
  4. Step 4: Simplify right side
    490,866.40x = 214,342,334,162.88
  5. Step 5: Solve for x
    x = 214,342,334,162.88/490,866.40
  6. Step 6: Final answer
    x = 436,661.25

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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.