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Finding the Fourth Proportional to 399,350.76, 551,096.70 and 218,057.76

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Solution

The fourth proportional to 399,350.76, 551,096.70 and 218,057.76 is: 300,915.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,350.76 : 551,096.70 = 218,057.76 : x
  2. Step 2: Convert to fraction form
    399,350.76/551,096.70 = 218,057.76/x
  3. Step 3: Cross multiply
    399,350.76x = 551,096.70 × 218,057.76
  4. Step 4: Simplify right side
    399,350.76x = 120,170,911,945.39
  5. Step 5: Solve for x
    x = 120,170,911,945.39/399,350.76
  6. Step 6: Final answer
    x = 300,915.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.