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Finding the Fourth Proportional to 400,343.88, 551,215.62 and 339,788.28

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Solution

The fourth proportional to 400,343.88, 551,215.62 and 339,788.28 is: 467,839.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,343.88 : 551,215.62 = 339,788.28 : x
  2. Step 2: Convert to fraction form
    400,343.88/551,215.62 = 339,788.28/x
  3. Step 3: Cross multiply
    400,343.88x = 551,215.62 × 339,788.28
  4. Step 4: Simplify right side
    400,343.88x = 187,296,607,428.93
  5. Step 5: Solve for x
    x = 187,296,607,428.93/400,343.88
  6. Step 6: Final answer
    x = 467,839.32

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1.5x scale

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.