Home / 689,983.80-952,176.60-388,177.80

Finding the Fourth Proportional to 689,983.80, 952,176.60 and 388,177.80

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Solution

The fourth proportional to 689,983.80, 952,176.60 and 388,177.80 is: 535,684.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,983.80 : 952,176.60 = 388,177.80 : x
  2. Step 2: Convert to fraction form
    689,983.80/952,176.60 = 388,177.80/x
  3. Step 3: Cross multiply
    689,983.80x = 952,176.60 × 388,177.80
  4. Step 4: Simplify right side
    689,983.80x = 369,613,817,799.48
  5. Step 5: Solve for x
    x = 369,613,817,799.48/689,983.80
  6. Step 6: Final answer
    x = 535,684.78

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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.