Home / 739,042.89-1,019,878.79-399,511.77

Finding the Fourth Proportional to 739,042.89, 1,019,878.79 and 399,511.77

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Solution

The fourth proportional to 739,042.89, 1,019,878.79 and 399,511.77 is: 551,326.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,042.89 : 1,019,878.79 = 399,511.77 : x
  2. Step 2: Convert to fraction form
    739,042.89/1,019,878.79 = 399,511.77/x
  3. Step 3: Cross multiply
    739,042.89x = 1,019,878.79 × 399,511.77
  4. Step 4: Simplify right side
    739,042.89x = 407,453,578,580.80
  5. Step 5: Solve for x
    x = 407,453,578,580.80/739,042.89
  6. Step 6: Final answer
    x = 551,326.02

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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.