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Finding the Fourth Proportional to 324,506.40, 486,814.80 and 99,861.72

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Solution

The fourth proportional to 324,506.40, 486,814.80 and 99,861.72 is: 149,809.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,506.40 : 486,814.80 = 99,861.72 : x
  2. Step 2: Convert to fraction form
    324,506.40/486,814.80 = 99,861.72/x
  3. Step 3: Cross multiply
    324,506.40x = 486,814.80 × 99,861.72
  4. Step 4: Simplify right side
    324,506.40x = 48,614,163,249.46
  5. Step 5: Solve for x
    x = 48,614,163,249.46/324,506.40
  6. Step 6: Final answer
    x = 149,809.57

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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.