Home / 739,518.94-1,020,532.80-399,986.38

Finding the Fourth Proportional to 739,518.94, 1,020,532.80 and 399,986.38

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Solution

The fourth proportional to 739,518.94, 1,020,532.80 and 399,986.38 is: 551,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,518.94 : 1,020,532.80 = 399,986.38 : x
  2. Step 2: Convert to fraction form
    739,518.94/1,020,532.80 = 399,986.38/x
  3. Step 3: Cross multiply
    739,518.94x = 1,020,532.80 × 399,986.38
  4. Step 4: Simplify right side
    739,518.94x = 408,199,220,343.26
  5. Step 5: Solve for x
    x = 408,199,220,343.26/739,518.94
  6. Step 6: Final answer
    x = 551,979.40

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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.