Home / 778,520.94-1,074,390.76-491,936.46

Finding the Fourth Proportional to 778,520.94, 1,074,390.76 and 491,936.46

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Solution

The fourth proportional to 778,520.94, 1,074,390.76 and 491,936.46 is: 678,892.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,520.94 : 1,074,390.76 = 491,936.46 : x
  2. Step 2: Convert to fraction form
    778,520.94/1,074,390.76 = 491,936.46/x
  3. Step 3: Cross multiply
    778,520.94x = 1,074,390.76 × 491,936.46
  4. Step 4: Simplify right side
    778,520.94x = 528,531,987,131.11
  5. Step 5: Solve for x
    x = 528,531,987,131.11/778,520.94
  6. Step 6: Final answer
    x = 678,892.45

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Double scale
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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.