Home / 678,120.20-1,018,346.70-442,507.40

Finding the Fourth Proportional to 678,120.20, 1,018,346.70 and 442,507.40

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Solution

The fourth proportional to 678,120.20, 1,018,346.70 and 442,507.40 is: 664,522.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,120.20 : 1,018,346.70 = 442,507.40 : x
  2. Step 2: Convert to fraction form
    678,120.20/1,018,346.70 = 442,507.40/x
  3. Step 3: Cross multiply
    678,120.20x = 1,018,346.70 × 442,507.40
  4. Step 4: Simplify right side
    678,120.20x = 450,625,950,515.58
  5. Step 5: Solve for x
    x = 450,625,950,515.58/678,120.20
  6. Step 6: Final answer
    x = 664,522.23

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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.