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Finding the Fourth Proportional to 557,399.20, 835,612.80 and 379,328.80

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Solution

The fourth proportional to 557,399.20, 835,612.80 and 379,328.80 is: 568,662.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,399.20 : 835,612.80 = 379,328.80 : x
  2. Step 2: Convert to fraction form
    557,399.20/835,612.80 = 379,328.80/x
  3. Step 3: Cross multiply
    557,399.20x = 835,612.80 × 379,328.80
  4. Step 4: Simplify right side
    557,399.20x = 316,972,000,688.64
  5. Step 5: Solve for x
    x = 316,972,000,688.64/557,399.20
  6. Step 6: Final answer
    x = 568,662.46

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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.