Home / 689,934.55-952,108.23-388,128.55

Finding the Fourth Proportional to 689,934.55, 952,108.23 and 388,128.55

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Solution

The fourth proportional to 689,934.55, 952,108.23 and 388,128.55 is: 535,616.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,934.55 : 952,108.23 = 388,128.55 : x
  2. Step 2: Convert to fraction form
    689,934.55/952,108.23 = 388,128.55/x
  3. Step 3: Cross multiply
    689,934.55x = 952,108.23 × 388,128.55
  4. Step 4: Simplify right side
    689,934.55x = 369,540,386,752.97
  5. Step 5: Solve for x
    x = 369,540,386,752.97/689,934.55
  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.