Home / 678,756.85-1,018,356.75-323,724.75

Finding the Fourth Proportional to 678,756.85, 1,018,356.75 and 323,724.75

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Solution

The fourth proportional to 678,756.85, 1,018,356.75 and 323,724.75 is: 485,692.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,756.85 : 1,018,356.75 = 323,724.75 : x
  2. Step 2: Convert to fraction form
    678,756.85/1,018,356.75 = 323,724.75/x
  3. Step 3: Cross multiply
    678,756.85x = 1,018,356.75 × 323,724.75
  4. Step 4: Simplify right side
    678,756.85x = 329,667,279,212.78
  5. Step 5: Solve for x
    x = 329,667,279,212.78/678,756.85
  6. Step 6: Final answer
    x = 485,692.75

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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.