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Finding the Fourth Proportional to 348,698.88, 479,694.40 and 305,483.76

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Solution

The fourth proportional to 348,698.88, 479,694.40 and 305,483.76 is: 420,244.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,698.88 : 479,694.40 = 305,483.76 : x
  2. Step 2: Convert to fraction form
    348,698.88/479,694.40 = 305,483.76/x
  3. Step 3: Cross multiply
    348,698.88x = 479,694.40 × 305,483.76
  4. Step 4: Simplify right side
    348,698.88x = 146,538,848,962.94
  5. Step 5: Solve for x
    x = 146,538,848,962.94/348,698.88
  6. Step 6: Final answer
    x = 420,244.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.