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Finding the Fourth Proportional to 399,333.56, 551,102.63 and 218,062.31

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Solution

The fourth proportional to 399,333.56, 551,102.63 and 218,062.31 is: 300,938.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,333.56 : 551,102.63 = 218,062.31 : x
  2. Step 2: Convert to fraction form
    399,333.56/551,102.63 = 218,062.31/x
  3. Step 3: Cross multiply
    399,333.56x = 551,102.63 × 218,062.31
  4. Step 4: Simplify right side
    399,333.56x = 120,174,711,454.56
  5. Step 5: Solve for x
    x = 120,174,711,454.56/399,333.56
  6. Step 6: Final answer
    x = 300,938.17

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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.