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Finding the Fourth Proportional to 561,719.99, 775,086.86 and 319,971.84

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Solution

The fourth proportional to 561,719.99, 775,086.86 and 319,971.84 is: 441,511.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,719.99 : 775,086.86 = 319,971.84 : x
  2. Step 2: Convert to fraction form
    561,719.99/775,086.86 = 319,971.84/x
  3. Step 3: Cross multiply
    561,719.99x = 775,086.86 × 319,971.84
  4. Step 4: Simplify right side
    561,719.99x = 248,005,967,154.16
  5. Step 5: Solve for x
    x = 248,005,967,154.16/561,719.99
  6. Step 6: Final answer
    x = 441,511.74

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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.