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Finding the Fourth Proportional to 611,091.54, 843,293.64 and 339,143.64

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Solution

The fourth proportional to 611,091.54, 843,293.64 and 339,143.64 is: 468,011.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,091.54 : 843,293.64 = 339,143.64 : x
  2. Step 2: Convert to fraction form
    611,091.54/843,293.64 = 339,143.64/x
  3. Step 3: Cross multiply
    611,091.54x = 843,293.64 × 339,143.64
  4. Step 4: Simplify right side
    611,091.54x = 285,997,674,658.45
  5. Step 5: Solve for x
    x = 285,997,674,658.45/611,091.54
  6. Step 6: Final answer
    x = 468,011.18

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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.