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Finding the Fourth Proportional to 689,956.56, 952,138.56 and 388,150.56

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Solution

The fourth proportional to 689,956.56, 952,138.56 and 388,150.56 is: 535,646.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,956.56 : 952,138.56 = 388,150.56 : x
  2. Step 2: Convert to fraction form
    689,956.56/952,138.56 = 388,150.56/x
  3. Step 3: Cross multiply
    689,956.56x = 952,138.56 × 388,150.56
  4. Step 4: Simplify right side
    689,956.56x = 369,573,115,261.59
  5. Step 5: Solve for x
    x = 369,573,115,261.59/689,956.56
  6. Step 6: Final answer
    x = 535,646.93

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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.