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Finding the Fourth Proportional to 639,592.42, 959,890 and 446,209.26

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Solution

The fourth proportional to 639,592.42, 959,890 and 446,209.26 is: 669,663.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,592.42 : 959,890 = 446,209.26 : x
  2. Step 2: Convert to fraction form
    639,592.42/959,890 = 446,209.26/x
  3. Step 3: Cross multiply
    639,592.42x = 959,890 × 446,209.26
  4. Step 4: Simplify right side
    639,592.42x = 428,311,806,581.40
  5. Step 5: Solve for x
    x = 428,311,806,581.40/639,592.42
  6. Step 6: Final answer
    x = 669,663.67

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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.