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Finding the Fourth Proportional to 611,152.60, 916,728.90 and 161,942.80

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Solution

The fourth proportional to 611,152.60, 916,728.90 and 161,942.80 is: 242,914.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,152.60 : 916,728.90 = 161,942.80 : x
  2. Step 2: Convert to fraction form
    611,152.60/916,728.90 = 161,942.80/x
  3. Step 3: Cross multiply
    611,152.60x = 916,728.90 × 161,942.80
  4. Step 4: Simplify right side
    611,152.60x = 148,457,644,906.92
  5. Step 5: Solve for x
    x = 148,457,644,906.92/611,152.60
  6. Step 6: Final answer
    x = 242,914.20

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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.