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Finding the Fourth Proportional to 678,860.10, 936,722.94 and 392,324.94

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Solution

The fourth proportional to 678,860.10, 936,722.94 and 392,324.94 is: 541,348.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,860.10 : 936,722.94 = 392,324.94 : x
  2. Step 2: Convert to fraction form
    678,860.10/936,722.94 = 392,324.94/x
  3. Step 3: Cross multiply
    678,860.10x = 936,722.94 × 392,324.94
  4. Step 4: Simplify right side
    678,860.10x = 367,499,771,232.12
  5. Step 5: Solve for x
    x = 367,499,771,232.12/678,860.10
  6. Step 6: Final answer
    x = 541,348.31

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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.