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Finding the Fourth Proportional to 379,903.50, 570,052.08 and 192,915

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Solution

The fourth proportional to 379,903.50, 570,052.08 and 192,915 is: 289,472.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,903.50 : 570,052.08 = 192,915 : x
  2. Step 2: Convert to fraction form
    379,903.50/570,052.08 = 192,915/x
  3. Step 3: Cross multiply
    379,903.50x = 570,052.08 × 192,915
  4. Step 4: Simplify right side
    379,903.50x = 109,971,597,013.20
  5. Step 5: Solve for x
    x = 109,971,597,013.20/379,903.50
  6. Step 6: Final answer
    x = 289,472.45

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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.