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Finding the Fourth Proportional to 324,341.45, 486,558.61 and 99,720.75

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Solution

The fourth proportional to 324,341.45, 486,558.61 and 99,720.75 is: 149,595.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,341.45 : 486,558.61 = 99,720.75 : x
  2. Step 2: Convert to fraction form
    324,341.45/486,558.61 = 99,720.75/x
  3. Step 3: Cross multiply
    324,341.45x = 486,558.61 × 99,720.75
  4. Step 4: Simplify right side
    324,341.45x = 48,519,989,508.16
  5. Step 5: Solve for x
    x = 48,519,989,508.16/324,341.45
  6. Step 6: Final answer
    x = 149,595.40

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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.