Home / 409,383.72-611,197.03-312,815.55

Finding the Fourth Proportional to 409,383.72, 611,197.03 and 312,815.55

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Solution

The fourth proportional to 409,383.72, 611,197.03 and 312,815.55 is: 467,023.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,383.72 : 611,197.03 = 312,815.55 : x
  2. Step 2: Convert to fraction form
    409,383.72/611,197.03 = 312,815.55/x
  3. Step 3: Cross multiply
    409,383.72x = 611,197.03 × 312,815.55
  4. Step 4: Simplify right side
    409,383.72x = 191,191,935,097.82
  5. Step 5: Solve for x
    x = 191,191,935,097.82/409,383.72
  6. Step 6: Final answer
    x = 467,023.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.