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Finding the Fourth Proportional to 631,764.40, 871,821.92 and 345,286.52

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Solution

The fourth proportional to 631,764.40, 871,821.92 and 345,286.52 is: 476,488.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,764.40 : 871,821.92 = 345,286.52 : x
  2. Step 2: Convert to fraction form
    631,764.40/871,821.92 = 345,286.52/x
  3. Step 3: Cross multiply
    631,764.40x = 871,821.92 × 345,286.52
  4. Step 4: Simplify right side
    631,764.40x = 301,028,356,816.52
  5. Step 5: Solve for x
    x = 301,028,356,816.52/631,764.40
  6. Step 6: Final answer
    x = 476,488.32

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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.