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Finding the Fourth Proportional to 611,505.10, 843,884.69 and 339,589.92

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Solution

The fourth proportional to 611,505.10, 843,884.69 and 339,589.92 is: 468,638.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,505.10 : 843,884.69 = 339,589.92 : x
  2. Step 2: Convert to fraction form
    611,505.10/843,884.69 = 339,589.92/x
  3. Step 3: Cross multiply
    611,505.10x = 843,884.69 × 339,589.92
  4. Step 4: Simplify right side
    611,505.10x = 286,574,734,366.33
  5. Step 5: Solve for x
    x = 286,574,734,366.33/611,505.10
  6. Step 6: Final answer
    x = 468,638.34

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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.