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Finding the Fourth Proportional to 485,786.72, 670,467 and 294,927.20

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Solution

The fourth proportional to 485,786.72, 670,467 and 294,927.20 is: 407,048.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,786.72 : 670,467 = 294,927.20 : x
  2. Step 2: Convert to fraction form
    485,786.72/670,467 = 294,927.20/x
  3. Step 3: Cross multiply
    485,786.72x = 670,467 × 294,927.20
  4. Step 4: Simplify right side
    485,786.72x = 197,738,955,002.40
  5. Step 5: Solve for x
    x = 197,738,955,002.40/485,786.72
  6. Step 6: Final answer
    x = 407,048.91

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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.