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Finding the Fourth Proportional to 604,090.80, 905,099.40 and 393,620.40

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Solution

The fourth proportional to 604,090.80, 905,099.40 and 393,620.40 is: 589,755.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,090.80 : 905,099.40 = 393,620.40 : x
  2. Step 2: Convert to fraction form
    604,090.80/905,099.40 = 393,620.40/x
  3. Step 3: Cross multiply
    604,090.80x = 905,099.40 × 393,620.40
  4. Step 4: Simplify right side
    604,090.80x = 356,265,587,867.76
  5. Step 5: Solve for x
    x = 356,265,587,867.76/604,090.80
  6. Step 6: Final answer
    x = 589,755.03

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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.