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Finding the Fourth Proportional to 678,934.12, 936,958.76 and 377,128.12

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Solution

The fourth proportional to 678,934.12, 936,958.76 and 377,128.12 is: 520,453.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,934.12 : 936,958.76 = 377,128.12 : x
  2. Step 2: Convert to fraction form
    678,934.12/936,958.76 = 377,128.12/x
  3. Step 3: Cross multiply
    678,934.12x = 936,958.76 × 377,128.12
  4. Step 4: Simplify right side
    678,934.12x = 353,353,495,676.33
  5. Step 5: Solve for x
    x = 353,353,495,676.33/678,934.12
  6. Step 6: Final answer
    x = 520,453.29

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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.