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Finding the Fourth Proportional to 493,460.20, 740,190.30 and 316,313.20

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Solution

The fourth proportional to 493,460.20, 740,190.30 and 316,313.20 is: 474,469.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,460.20 : 740,190.30 = 316,313.20 : x
  2. Step 2: Convert to fraction form
    493,460.20/740,190.30 = 316,313.20/x
  3. Step 3: Cross multiply
    493,460.20x = 740,190.30 × 316,313.20
  4. Step 4: Simplify right side
    493,460.20x = 234,131,962,401.96
  5. Step 5: Solve for x
    x = 234,131,962,401.96/493,460.20
  6. Step 6: Final answer
    x = 474,469.80

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Double scale
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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.