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Finding the Fourth Proportional to 321,332.78, 479,126.33 and 312,504.86

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Solution

The fourth proportional to 321,332.78, 479,126.33 and 312,504.86 is: 465,963.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,332.78 : 479,126.33 = 312,504.86 : x
  2. Step 2: Convert to fraction form
    321,332.78/479,126.33 = 312,504.86/x
  3. Step 3: Cross multiply
    321,332.78x = 479,126.33 × 312,504.86
  4. Step 4: Simplify right side
    321,332.78x = 149,729,307,486.15
  5. Step 5: Solve for x
    x = 149,729,307,486.15/321,332.78
  6. Step 6: Final answer
    x = 465,963.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.