Home / 689,935.55-952,109.61-388,129.55

Finding the Fourth Proportional to 689,935.55, 952,109.61 and 388,129.55

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Solution

The fourth proportional to 689,935.55, 952,109.61 and 388,129.55 is: 535,617.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,935.55 : 952,109.61 = 388,129.55 : x
  2. Step 2: Convert to fraction form
    689,935.55/952,109.61 = 388,129.55/x
  3. Step 3: Cross multiply
    689,935.55x = 952,109.61 × 388,129.55
  4. Step 4: Simplify right side
    689,935.55x = 369,541,874,479.98
  5. Step 5: Solve for x
    x = 369,541,874,479.98/689,935.55
  6. Step 6: Final answer
    x = 535,617.96

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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.