Home / 689,942.10-952,096.77-388,077.78

Finding the Fourth Proportional to 689,942.10, 952,096.77 and 388,077.78

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Solution

The fourth proportional to 689,942.10, 952,096.77 and 388,077.78 is: 535,534.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,942.10 : 952,096.77 = 388,077.78 : x
  2. Step 2: Convert to fraction form
    689,942.10/952,096.77 = 388,077.78/x
  3. Step 3: Cross multiply
    689,942.10x = 952,096.77 × 388,077.78
  4. Step 4: Simplify right side
    689,942.10x = 369,487,600,846.77
  5. Step 5: Solve for x
    x = 369,487,600,846.77/689,942.10
  6. Step 6: Final answer
    x = 535,534.21

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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.