Home / 680,857.90-1,021,286.85-442,912.30

Finding the Fourth Proportional to 680,857.90, 1,021,286.85 and 442,912.30

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Solution

The fourth proportional to 680,857.90, 1,021,286.85 and 442,912.30 is: 664,368.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,857.90 : 1,021,286.85 = 442,912.30 : x
  2. Step 2: Convert to fraction form
    680,857.90/1,021,286.85 = 442,912.30/x
  3. Step 3: Cross multiply
    680,857.90x = 1,021,286.85 × 442,912.30
  4. Step 4: Simplify right side
    680,857.90x = 452,340,507,693.26
  5. Step 5: Solve for x
    x = 452,340,507,693.26/680,857.90
  6. Step 6: Final answer
    x = 664,368.45

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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.