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Finding the Fourth Proportional to 631,115.40, 946,212.30 and 256,945.80

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Solution

The fourth proportional to 631,115.40, 946,212.30 and 256,945.80 is: 385,231.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,115.40 : 946,212.30 = 256,945.80 : x
  2. Step 2: Convert to fraction form
    631,115.40/946,212.30 = 256,945.80/x
  3. Step 3: Cross multiply
    631,115.40x = 946,212.30 × 256,945.80
  4. Step 4: Simplify right side
    631,115.40x = 243,125,276,393.34
  5. Step 5: Solve for x
    x = 243,125,276,393.34/631,115.40
  6. Step 6: Final answer
    x = 385,231.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.