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Finding the Fourth Proportional to 670,978, 925,964.04 and 369,172.56

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Solution

The fourth proportional to 670,978, 925,964.04 and 369,172.56 is: 509,466.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,978 : 925,964.04 = 369,172.56 : x
  2. Step 2: Convert to fraction form
    670,978/925,964.04 = 369,172.56/x
  3. Step 3: Cross multiply
    670,978x = 925,964.04 × 369,172.56
  4. Step 4: Simplify right side
    670,978x = 341,840,515,114.74
  5. Step 5: Solve for x
    x = 341,840,515,114.74/670,978
  6. Step 6: Final answer
    x = 509,466.06

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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.