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Finding the Fourth Proportional to 482,392.85, 665,594.87 and 278,400.56

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Solution

The fourth proportional to 482,392.85, 665,594.87 and 278,400.56 is: 384,130.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,392.85 : 665,594.87 = 278,400.56 : x
  2. Step 2: Convert to fraction form
    482,392.85/665,594.87 = 278,400.56/x
  3. Step 3: Cross multiply
    482,392.85x = 665,594.87 × 278,400.56
  4. Step 4: Simplify right side
    482,392.85x = 185,301,979,821.15
  5. Step 5: Solve for x
    x = 185,301,979,821.15/482,392.85
  6. Step 6: Final answer
    x = 384,130.86

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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.