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Finding the Fourth Proportional to 320,812.60, 481,218.90 and 291,288.10

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Solution

The fourth proportional to 320,812.60, 481,218.90 and 291,288.10 is: 436,932.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,812.60 : 481,218.90 = 291,288.10 : x
  2. Step 2: Convert to fraction form
    320,812.60/481,218.90 = 291,288.10/x
  3. Step 3: Cross multiply
    320,812.60x = 481,218.90 × 291,288.10
  4. Step 4: Simplify right side
    320,812.60x = 140,173,339,065.09
  5. Step 5: Solve for x
    x = 140,173,339,065.09/320,812.60
  6. Step 6: Final answer
    x = 436,932.15

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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.