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Finding the Fourth Proportional to 561,712.70, 840,819.45 and 404,248.70

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Solution

The fourth proportional to 561,712.70, 840,819.45 and 404,248.70 is: 605,113.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,712.70 : 840,819.45 = 404,248.70 : x
  2. Step 2: Convert to fraction form
    561,712.70/840,819.45 = 404,248.70/x
  3. Step 3: Cross multiply
    561,712.70x = 840,819.45 × 404,248.70
  4. Step 4: Simplify right side
    561,712.70x = 339,900,169,597.22
  5. Step 5: Solve for x
    x = 339,900,169,597.22/561,712.70
  6. Step 6: Final answer
    x = 605,113.91

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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.