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Finding the Fourth Proportional to 216,411.46, 324,515.03 and 126,479.98

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Solution

The fourth proportional to 216,411.46, 324,515.03 and 126,479.98 is: 189,660.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,411.46 : 324,515.03 = 126,479.98 : x
  2. Step 2: Convert to fraction form
    216,411.46/324,515.03 = 126,479.98/x
  3. Step 3: Cross multiply
    216,411.46x = 324,515.03 × 126,479.98
  4. Step 4: Simplify right side
    216,411.46x = 41,044,652,807.67
  5. Step 5: Solve for x
    x = 41,044,652,807.67/216,411.46
  6. Step 6: Final answer
    x = 189,660.25

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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.