Home / 678,971.35-1,016,980.80-412,266.70

Finding the Fourth Proportional to 678,971.35, 1,016,980.80 and 412,266.70

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Solution

The fourth proportional to 678,971.35, 1,016,980.80 and 412,266.70 is: 617,503.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,971.35 : 1,016,980.80 = 412,266.70 : x
  2. Step 2: Convert to fraction form
    678,971.35/1,016,980.80 = 412,266.70/x
  3. Step 3: Cross multiply
    678,971.35x = 1,016,980.80 × 412,266.70
  4. Step 4: Simplify right side
    678,971.35x = 419,267,318,379.36
  5. Step 5: Solve for x
    x = 419,267,318,379.36/678,971.35
  6. Step 6: Final answer
    x = 617,503.70

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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.