Home / 739,439.19-1,020,426.75-399,907.44

Finding the Fourth Proportional to 739,439.19, 1,020,426.75 and 399,907.44

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Solution

The fourth proportional to 739,439.19, 1,020,426.75 and 399,907.44 is: 551,872.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,439.19 : 1,020,426.75 = 399,907.44 : x
  2. Step 2: Convert to fraction form
    739,439.19/1,020,426.75 = 399,907.44/x
  3. Step 3: Cross multiply
    739,439.19x = 1,020,426.75 × 399,907.44
  4. Step 4: Simplify right side
    739,439.19x = 408,076,249,300.02
  5. Step 5: Solve for x
    x = 408,076,249,300.02/739,439.19
  6. Step 6: Final answer
    x = 551,872.63

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Double scale
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Similar ratio
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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.