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Finding the Fourth Proportional to 312,593.76, 431,353.89 and 183,518.64

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Solution

The fourth proportional to 312,593.76, 431,353.89 and 183,518.64 is: 253,240.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,593.76 : 431,353.89 = 183,518.64 : x
  2. Step 2: Convert to fraction form
    312,593.76/431,353.89 = 183,518.64/x
  3. Step 3: Cross multiply
    312,593.76x = 431,353.89 × 183,518.64
  4. Step 4: Simplify right side
    312,593.76x = 79,161,479,251.51
  5. Step 5: Solve for x
    x = 79,161,479,251.51/312,593.76
  6. Step 6: Final answer
    x = 253,240.75

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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.