Home / 645,917.72-891,353.22-404,333.49

Finding the Fourth Proportional to 645,917.72, 891,353.22 and 404,333.49

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Solution

The fourth proportional to 645,917.72, 891,353.22 and 404,333.49 is: 557,971.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,917.72 : 891,353.22 = 404,333.49 : x
  2. Step 2: Convert to fraction form
    645,917.72/891,353.22 = 404,333.49/x
  3. Step 3: Cross multiply
    645,917.72x = 891,353.22 × 404,333.49
  4. Step 4: Simplify right side
    645,917.72x = 360,403,960,091.66
  5. Step 5: Solve for x
    x = 360,403,960,091.66/645,917.72
  6. Step 6: Final answer
    x = 557,971.94

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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.