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Finding the Fourth Proportional to 714,237.78, 985,676.57 and 391,959.42

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Solution

The fourth proportional to 714,237.78, 985,676.57 and 391,959.42 is: 540,919.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,237.78 : 985,676.57 = 391,959.42 : x
  2. Step 2: Convert to fraction form
    714,237.78/985,676.57 = 391,959.42/x
  3. Step 3: Cross multiply
    714,237.78x = 985,676.57 × 391,959.42
  4. Step 4: Simplify right side
    714,237.78x = 386,345,214,703.33
  5. Step 5: Solve for x
    x = 386,345,214,703.33/714,237.78
  6. Step 6: Final answer
    x = 540,919.60

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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.