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Finding the Fourth Proportional to 489,674.80, 734,512.20 and 402,194.80

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Solution

The fourth proportional to 489,674.80, 734,512.20 and 402,194.80 is: 603,292.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,674.80 : 734,512.20 = 402,194.80 : x
  2. Step 2: Convert to fraction form
    489,674.80/734,512.20 = 402,194.80/x
  3. Step 3: Cross multiply
    489,674.80x = 734,512.20 × 402,194.80
  4. Step 4: Simplify right side
    489,674.80x = 295,416,987,376.56
  5. Step 5: Solve for x
    x = 295,416,987,376.56/489,674.80
  6. Step 6: Final answer
    x = 603,292.20

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Similar ratio
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1.5x scale

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.