Home / 739,439.31-1,020,426.92-399,907.56

Finding the Fourth Proportional to 739,439.31, 1,020,426.92 and 399,907.56

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Solution

The fourth proportional to 739,439.31, 1,020,426.92 and 399,907.56 is: 551,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,439.31 : 1,020,426.92 = 399,907.56 : x
  2. Step 2: Convert to fraction form
    739,439.31/1,020,426.92 = 399,907.56/x
  3. Step 3: Cross multiply
    739,439.31x = 1,020,426.92 × 399,907.56
  4. Step 4: Simplify right side
    739,439.31x = 408,076,439,735.52
  5. Step 5: Solve for x
    x = 408,076,439,735.52/739,439.31
  6. Step 6: Final answer
    x = 551,872.80

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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.