Home / 678,939.75-936,937.35-373,035.78

Finding the Fourth Proportional to 678,939.75, 936,937.35 and 373,035.78

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Solution

The fourth proportional to 678,939.75, 936,937.35 and 373,035.78 is: 514,789.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,939.75 : 936,937.35 = 373,035.78 : x
  2. Step 2: Convert to fraction form
    678,939.75/936,937.35 = 373,035.78/x
  3. Step 3: Cross multiply
    678,939.75x = 936,937.35 × 373,035.78
  4. Step 4: Simplify right side
    678,939.75x = 349,511,155,168.38
  5. Step 5: Solve for x
    x = 349,511,155,168.38/678,939.75
  6. Step 6: Final answer
    x = 514,789.65

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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.