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Finding the Fourth Proportional to 365,742.80, 548,614.20 and 319,086.80

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Solution

The fourth proportional to 365,742.80, 548,614.20 and 319,086.80 is: 478,630.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,742.80 : 548,614.20 = 319,086.80 : x
  2. Step 2: Convert to fraction form
    365,742.80/548,614.20 = 319,086.80/x
  3. Step 3: Cross multiply
    365,742.80x = 548,614.20 × 319,086.80
  4. Step 4: Simplify right side
    365,742.80x = 175,055,549,512.56
  5. Step 5: Solve for x
    x = 175,055,549,512.56/365,742.80
  6. Step 6: Final answer
    x = 478,630.20

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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.