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Finding the Fourth Proportional to 603,209.40, 905,505.30 and 354,031.80

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Solution

The fourth proportional to 603,209.40, 905,505.30 and 354,031.80 is: 531,453.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,209.40 : 905,505.30 = 354,031.80 : x
  2. Step 2: Convert to fraction form
    603,209.40/905,505.30 = 354,031.80/x
  3. Step 3: Cross multiply
    603,209.40x = 905,505.30 × 354,031.80
  4. Step 4: Simplify right side
    603,209.40x = 320,577,671,268.54
  5. Step 5: Solve for x
    x = 320,577,671,268.54/603,209.40
  6. Step 6: Final answer
    x = 531,453.37

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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.