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Finding the Fourth Proportional to 399,859.17, 551,448.34 and 331,768.32

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Solution

The fourth proportional to 399,859.17, 551,448.34 and 331,768.32 is: 457,543.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,859.17 : 551,448.34 = 331,768.32 : x
  2. Step 2: Convert to fraction form
    399,859.17/551,448.34 = 331,768.32/x
  3. Step 3: Cross multiply
    399,859.17x = 551,448.34 × 331,768.32
  4. Step 4: Simplify right side
    399,859.17x = 182,953,089,328.59
  5. Step 5: Solve for x
    x = 182,953,089,328.59/399,859.17
  6. Step 6: Final answer
    x = 457,543.81

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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.