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Finding the Fourth Proportional to 521,010.10, 781,515.15 and 188,542.90

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Solution

The fourth proportional to 521,010.10, 781,515.15 and 188,542.90 is: 282,814.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,010.10 : 781,515.15 = 188,542.90 : x
  2. Step 2: Convert to fraction form
    521,010.10/781,515.15 = 188,542.90/x
  3. Step 3: Cross multiply
    521,010.10x = 781,515.15 × 188,542.90
  4. Step 4: Simplify right side
    521,010.10x = 147,349,132,774.94
  5. Step 5: Solve for x
    x = 147,349,132,774.94/521,010.10
  6. Step 6: Final answer
    x = 282,814.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.