Home / 411,982.45-618,308.90-212,359.92

Finding the Fourth Proportional to 411,982.45, 618,308.90 and 212,359.92

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Solution

The fourth proportional to 411,982.45, 618,308.90 and 212,359.92 is: 318,712.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,982.45 : 618,308.90 = 212,359.92 : x
  2. Step 2: Convert to fraction form
    411,982.45/618,308.90 = 212,359.92/x
  3. Step 3: Cross multiply
    411,982.45x = 618,308.90 × 212,359.92
  4. Step 4: Simplify right side
    411,982.45x = 131,304,027,477.49
  5. Step 5: Solve for x
    x = 131,304,027,477.49/411,982.45
  6. Step 6: Final answer
    x = 318,712.67

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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.