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Finding the Fourth Proportional to 611,135.69, 843,298.85 and 339,215.04

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Solution

The fourth proportional to 611,135.69, 843,298.85 and 339,215.04 is: 468,078.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,135.69 : 843,298.85 = 339,215.04 : x
  2. Step 2: Convert to fraction form
    611,135.69/843,298.85 = 339,215.04/x
  3. Step 3: Cross multiply
    611,135.69x = 843,298.85 × 339,215.04
  4. Step 4: Simplify right side
    611,135.69x = 286,059,652,074.66
  5. Step 5: Solve for x
    x = 286,059,652,074.66/611,135.69
  6. Step 6: Final answer
    x = 468,078.79

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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.