Home / 685,775.43-946,385.45-391,419.29

Finding the Fourth Proportional to 685,775.43, 946,385.45 and 391,419.29

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Solution

The fourth proportional to 685,775.43, 946,385.45 and 391,419.29 is: 540,167.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,775.43 : 946,385.45 = 391,419.29 : x
  2. Step 2: Convert to fraction form
    685,775.43/946,385.45 = 391,419.29/x
  3. Step 3: Cross multiply
    685,775.43x = 946,385.45 × 391,419.29
  4. Step 4: Simplify right side
    685,775.43x = 370,433,514,216.31
  5. Step 5: Solve for x
    x = 370,433,514,216.31/685,775.43
  6. Step 6: Final answer
    x = 540,167.38

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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.