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Finding the Fourth Proportional to 519,512.85, 716,920.89 and 290,074.05

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Solution

The fourth proportional to 519,512.85, 716,920.89 and 290,074.05 is: 400,298.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,512.85 : 716,920.89 = 290,074.05 : x
  2. Step 2: Convert to fraction form
    519,512.85/716,920.89 = 290,074.05/x
  3. Step 3: Cross multiply
    519,512.85x = 716,920.89 × 290,074.05
  4. Step 4: Simplify right side
    519,512.85x = 207,960,146,091.91
  5. Step 5: Solve for x
    x = 207,960,146,091.91/519,512.85
  6. Step 6: Final answer
    x = 400,298.37

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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.