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Finding the Fourth Proportional to 492,730.05, 739,040.40 and 137,779.95

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Solution

The fourth proportional to 492,730.05, 739,040.40 and 137,779.95 is: 206,654.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,730.05 : 739,040.40 = 137,779.95 : x
  2. Step 2: Convert to fraction form
    492,730.05/739,040.40 = 137,779.95/x
  3. Step 3: Cross multiply
    492,730.05x = 739,040.40 × 137,779.95
  4. Step 4: Simplify right side
    492,730.05x = 101,824,949,359.98
  5. Step 5: Solve for x
    x = 101,824,949,359.98/492,730.05
  6. Step 6: Final answer
    x = 206,654.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.