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Finding the Fourth Proportional to 689,930.55, 952,102.71 and 388,124.55

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Solution

The fourth proportional to 689,930.55, 952,102.71 and 388,124.55 is: 535,611.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,930.55 : 952,102.71 = 388,124.55 : x
  2. Step 2: Convert to fraction form
    689,930.55/952,102.71 = 388,124.55/x
  3. Step 3: Cross multiply
    689,930.55x = 952,102.71 × 388,124.55
  4. Step 4: Simplify right side
    689,930.55x = 369,534,435,872.53
  5. Step 5: Solve for x
    x = 369,534,435,872.53/689,930.55
  6. Step 6: Final answer
    x = 535,611.06

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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.