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Finding the Fourth Proportional to 612,384.20, 845,042.31 and 340,435.54

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Solution

The fourth proportional to 612,384.20, 845,042.31 and 340,435.54 is: 469,774.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,384.20 : 845,042.31 = 340,435.54 : x
  2. Step 2: Convert to fraction form
    612,384.20/845,042.31 = 340,435.54/x
  3. Step 3: Cross multiply
    612,384.20x = 845,042.31 × 340,435.54
  4. Step 4: Simplify right side
    612,384.20x = 287,682,433,015.09
  5. Step 5: Solve for x
    x = 287,682,433,015.09/612,384.20
  6. Step 6: Final answer
    x = 469,774.42

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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.