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Finding the Fourth Proportional to 399,771.60, 599,972.08 and 186,429.74

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Solution

The fourth proportional to 399,771.60, 599,972.08 and 186,429.74 is: 279,791.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,771.60 : 599,972.08 = 186,429.74 : x
  2. Step 2: Convert to fraction form
    399,771.60/599,972.08 = 186,429.74/x
  3. Step 3: Cross multiply
    399,771.60x = 599,972.08 × 186,429.74
  4. Step 4: Simplify right side
    399,771.60x = 111,852,638,881.66
  5. Step 5: Solve for x
    x = 111,852,638,881.66/399,771.60
  6. Step 6: Final answer
    x = 279,791.36

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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.