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Finding the Fourth Proportional to 645,422.80, 968,134.20 and 365,486.80

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Solution

The fourth proportional to 645,422.80, 968,134.20 and 365,486.80 is: 548,230.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,422.80 : 968,134.20 = 365,486.80 : x
  2. Step 2: Convert to fraction form
    645,422.80/968,134.20 = 365,486.80/x
  3. Step 3: Cross multiply
    645,422.80x = 968,134.20 × 365,486.80
  4. Step 4: Simplify right side
    645,422.80x = 353,840,270,728.56
  5. Step 5: Solve for x
    x = 353,840,270,728.56/645,422.80
  6. Step 6: Final answer
    x = 548,230.20

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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.