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Finding the Fourth Proportional to 320,792.40, 481,188.60 and 318,949.20

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Solution

The fourth proportional to 320,792.40, 481,188.60 and 318,949.20 is: 478,423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,792.40 : 481,188.60 = 318,949.20 : x
  2. Step 2: Convert to fraction form
    320,792.40/481,188.60 = 318,949.20/x
  3. Step 3: Cross multiply
    320,792.40x = 481,188.60 × 318,949.20
  4. Step 4: Simplify right side
    320,792.40x = 153,474,719,019.12
  5. Step 5: Solve for x
    x = 153,474,719,019.12/320,792.40
  6. Step 6: Final answer
    x = 478,423.80

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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.