Home / 678,700.20-936,502.08-392,164.72

Finding the Fourth Proportional to 678,700.20, 936,502.08 and 392,164.72

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Solution

The fourth proportional to 678,700.20, 936,502.08 and 392,164.72 is: 541,127.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,700.20 : 936,502.08 = 392,164.72 : x
  2. Step 2: Convert to fraction form
    678,700.20/936,502.08 = 392,164.72/x
  3. Step 3: Cross multiply
    678,700.20x = 936,502.08 × 392,164.72
  4. Step 4: Simplify right side
    678,700.20x = 367,263,075,982.62
  5. Step 5: Solve for x
    x = 367,263,075,982.62/678,700.20
  6. Step 6: Final answer
    x = 541,127.11

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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.