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Finding the Fourth Proportional to 694,347.70, 958,161.28 and 388,364.98

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Solution

The fourth proportional to 694,347.70, 958,161.28 and 388,364.98 is: 535,922.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,347.70 : 958,161.28 = 388,364.98 : x
  2. Step 2: Convert to fraction form
    694,347.70/958,161.28 = 388,364.98/x
  3. Step 3: Cross multiply
    694,347.70x = 958,161.28 × 388,364.98
  4. Step 4: Simplify right side
    694,347.70x = 372,116,286,343.97
  5. Step 5: Solve for x
    x = 372,116,286,343.97/694,347.70
  6. Step 6: Final answer
    x = 535,922.11

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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.