Home / 689,934.56-952,108.22-388,128.56

Finding the Fourth Proportional to 689,934.56, 952,108.22 and 388,128.56

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Solution

The fourth proportional to 689,934.56, 952,108.22 and 388,128.56 is: 535,616.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,934.56 : 952,108.22 = 388,128.56 : x
  2. Step 2: Convert to fraction form
    689,934.56/952,108.22 = 388,128.56/x
  3. Step 3: Cross multiply
    689,934.56x = 952,108.22 × 388,128.56
  4. Step 4: Simplify right side
    689,934.56x = 369,540,392,392.76
  5. Step 5: Solve for x
    x = 369,540,392,392.76/689,934.56
  6. Step 6: Final answer
    x = 535,616.58

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1.5x scale

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.