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Finding the Fourth Proportional to 362,915.40, 544,421.70 and 126,330.60

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Solution

The fourth proportional to 362,915.40, 544,421.70 and 126,330.60 is: 189,512.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,915.40 : 544,421.70 = 126,330.60 : x
  2. Step 2: Convert to fraction form
    362,915.40/544,421.70 = 126,330.60/x
  3. Step 3: Cross multiply
    362,915.40x = 544,421.70 × 126,330.60
  4. Step 4: Simplify right side
    362,915.40x = 68,777,120,014.02
  5. Step 5: Solve for x
    x = 68,777,120,014.02/362,915.40
  6. Step 6: Final answer
    x = 189,512.82

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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.