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Finding the Fourth Proportional to 394,744.80, 592,117.20 and 145,394.40

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Solution

The fourth proportional to 394,744.80, 592,117.20 and 145,394.40 is: 218,091.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,744.80 : 592,117.20 = 145,394.40 : x
  2. Step 2: Convert to fraction form
    394,744.80/592,117.20 = 145,394.40/x
  3. Step 3: Cross multiply
    394,744.80x = 592,117.20 × 145,394.40
  4. Step 4: Simplify right side
    394,744.80x = 86,090,525,023.68
  5. Step 5: Solve for x
    x = 86,090,525,023.68/394,744.80
  6. Step 6: Final answer
    x = 218,091.60

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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.