Home / 678,118.20-1,018,343.70-442,505.40

Finding the Fourth Proportional to 678,118.20, 1,018,343.70 and 442,505.40

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Solution

The fourth proportional to 678,118.20, 1,018,343.70 and 442,505.40 is: 664,519.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,118.20 : 1,018,343.70 = 442,505.40 : x
  2. Step 2: Convert to fraction form
    678,118.20/1,018,343.70 = 442,505.40/x
  3. Step 3: Cross multiply
    678,118.20x = 1,018,343.70 × 442,505.40
  4. Step 4: Simplify right side
    678,118.20x = 450,622,586,305.98
  5. Step 5: Solve for x
    x = 450,622,586,305.98/678,118.20
  6. Step 6: Final answer
    x = 664,519.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.