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Finding the Fourth Proportional to 667,393.64, 921,004.36 and 361,470.68

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Solution

The fourth proportional to 667,393.64, 921,004.36 and 361,470.68 is: 498,830.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,393.64 : 921,004.36 = 361,470.68 : x
  2. Step 2: Convert to fraction form
    667,393.64/921,004.36 = 361,470.68/x
  3. Step 3: Cross multiply
    667,393.64x = 921,004.36 × 361,470.68
  4. Step 4: Simplify right side
    667,393.64x = 332,916,072,292.17
  5. Step 5: Solve for x
    x = 332,916,072,292.17/667,393.64
  6. Step 6: Final answer
    x = 498,830.15

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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.