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Finding the Fourth Proportional to 678,685, 936,596.56 and 372,789.65

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Solution

The fourth proportional to 678,685, 936,596.56 and 372,789.65 is: 514,455.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,685 : 936,596.56 = 372,789.65 : x
  2. Step 2: Convert to fraction form
    678,685/936,596.56 = 372,789.65/x
  3. Step 3: Cross multiply
    678,685x = 936,596.56 × 372,789.65
  4. Step 4: Simplify right side
    678,685x = 349,153,503,793.60
  5. Step 5: Solve for x
    x = 349,153,503,793.60/678,685
  6. Step 6: Final answer
    x = 514,455.90

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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.