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Finding the Fourth Proportional to 367,912.80, 551,869.20 and 311,925.60

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Solution

The fourth proportional to 367,912.80, 551,869.20 and 311,925.60 is: 467,888.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,912.80 : 551,869.20 = 311,925.60 : x
  2. Step 2: Convert to fraction form
    367,912.80/551,869.20 = 311,925.60/x
  3. Step 3: Cross multiply
    367,912.80x = 551,869.20 × 311,925.60
  4. Step 4: Simplify right side
    367,912.80x = 172,142,131,331.52
  5. Step 5: Solve for x
    x = 172,142,131,331.52/367,912.80
  6. Step 6: Final answer
    x = 467,888.40

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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.