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Finding the Fourth Proportional to 618,495.88, 927,172.97 and 429,045.63

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Solution

The fourth proportional to 618,495.88, 927,172.97 and 429,045.63 is: 643,172.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,495.88 : 927,172.97 = 429,045.63 : x
  2. Step 2: Convert to fraction form
    618,495.88/927,172.97 = 429,045.63/x
  3. Step 3: Cross multiply
    618,495.88x = 927,172.97 × 429,045.63
  4. Step 4: Simplify right side
    618,495.88x = 397,799,511,032.62
  5. Step 5: Solve for x
    x = 397,799,511,032.62/618,495.88
  6. Step 6: Final answer
    x = 643,172.45

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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.