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Finding the Fourth Proportional to 490,153.20, 735,229.80 and 411,421.20

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Solution

The fourth proportional to 490,153.20, 735,229.80 and 411,421.20 is: 617,131.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,153.20 : 735,229.80 = 411,421.20 : x
  2. Step 2: Convert to fraction form
    490,153.20/735,229.80 = 411,421.20/x
  3. Step 3: Cross multiply
    490,153.20x = 735,229.80 × 411,421.20
  4. Step 4: Simplify right side
    490,153.20x = 302,489,126,591.76
  5. Step 5: Solve for x
    x = 302,489,126,591.76/490,153.20
  6. Step 6: Final answer
    x = 617,131.80

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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.