Home / 678,609.81-936,845.10-523,221.69

Finding the Fourth Proportional to 678,609.81, 936,845.10 and 523,221.69

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Solution

The fourth proportional to 678,609.81, 936,845.10 and 523,221.69 is: 722,326.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,609.81 : 936,845.10 = 523,221.69 : x
  2. Step 2: Convert to fraction form
    678,609.81/936,845.10 = 523,221.69/x
  3. Step 3: Cross multiply
    678,609.81x = 936,845.10 × 523,221.69
  4. Step 4: Simplify right side
    678,609.81x = 490,177,676,490.22
  5. Step 5: Solve for x
    x = 490,177,676,490.22/678,609.81
  6. Step 6: Final answer
    x = 722,326.25

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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.