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Finding the Fourth Proportional to 399,425.60, 598,963.44 and 118,886.96

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Solution

The fourth proportional to 399,425.60, 598,963.44 and 118,886.96 is: 178,278.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,425.60 : 598,963.44 = 118,886.96 : x
  2. Step 2: Convert to fraction form
    399,425.60/598,963.44 = 118,886.96/x
  3. Step 3: Cross multiply
    399,425.60x = 598,963.44 × 118,886.96
  4. Step 4: Simplify right side
    399,425.60x = 71,208,942,532.74
  5. Step 5: Solve for x
    x = 71,208,942,532.74/399,425.60
  6. Step 6: Final answer
    x = 178,278.36

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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.