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Finding the Fourth Proportional to 322,387.36, 483,579.92 and 85,729.76

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Solution

The fourth proportional to 322,387.36, 483,579.92 and 85,729.76 is: 128,594.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,387.36 : 483,579.92 = 85,729.76 : x
  2. Step 2: Convert to fraction form
    322,387.36/483,579.92 = 85,729.76/x
  3. Step 3: Cross multiply
    322,387.36x = 483,579.92 × 85,729.76
  4. Step 4: Simplify right side
    322,387.36x = 41,457,190,482.42
  5. Step 5: Solve for x
    x = 41,457,190,482.42/322,387.36
  6. Step 6: Final answer
    x = 128,594.34

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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.