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Finding the Fourth Proportional to 693,172.94, 956,470.82 and 391,360.46

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Solution

The fourth proportional to 693,172.94, 956,470.82 and 391,360.46 is: 540,016.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,172.94 : 956,470.82 = 391,360.46 : x
  2. Step 2: Convert to fraction form
    693,172.94/956,470.82 = 391,360.46/x
  3. Step 3: Cross multiply
    693,172.94x = 956,470.82 × 391,360.46
  4. Step 4: Simplify right side
    693,172.94x = 374,324,860,091.78
  5. Step 5: Solve for x
    x = 374,324,860,091.78/693,172.94
  6. Step 6: Final answer
    x = 540,016.55

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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.