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Finding the Fourth Proportional to 525,402.09, 724,481.55 and 355,340.97

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Solution

The fourth proportional to 525,402.09, 724,481.55 and 355,340.97 is: 489,982.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,402.09 : 724,481.55 = 355,340.97 : x
  2. Step 2: Convert to fraction form
    525,402.09/724,481.55 = 355,340.97/x
  3. Step 3: Cross multiply
    525,402.09x = 724,481.55 × 355,340.97
  4. Step 4: Simplify right side
    525,402.09x = 257,437,976,724.10
  5. Step 5: Solve for x
    x = 257,437,976,724.10/525,402.09
  6. Step 6: Final answer
    x = 489,982.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.