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Finding the Fourth Proportional to 644,307.67, 889,092.74 and 372,393.18

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Solution

The fourth proportional to 644,307.67, 889,092.74 and 372,393.18 is: 513,872.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,307.67 : 889,092.74 = 372,393.18 : x
  2. Step 2: Convert to fraction form
    644,307.67/889,092.74 = 372,393.18/x
  3. Step 3: Cross multiply
    644,307.67x = 889,092.74 × 372,393.18
  4. Step 4: Simplify right side
    644,307.67x = 331,092,070,901.55
  5. Step 5: Solve for x
    x = 331,092,070,901.55/644,307.67
  6. Step 6: Final answer
    x = 513,872.62

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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.