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Finding the Fourth Proportional to 553,971.36, 764,469.79 and 312,249.27

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Solution

The fourth proportional to 553,971.36, 764,469.79 and 312,249.27 is: 430,897.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,971.36 : 764,469.79 = 312,249.27 : x
  2. Step 2: Convert to fraction form
    553,971.36/764,469.79 = 312,249.27/x
  3. Step 3: Cross multiply
    553,971.36x = 764,469.79 × 312,249.27
  4. Step 4: Simplify right side
    553,971.36x = 238,705,133,083.93
  5. Step 5: Solve for x
    x = 238,705,133,083.93/553,971.36
  6. Step 6: Final answer
    x = 430,897.97

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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.