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Finding the Fourth Proportional to 631,767.28, 871,836.72 and 345,287.28

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Solution

The fourth proportional to 631,767.28, 871,836.72 and 345,287.28 is: 476,495.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,767.28 : 871,836.72 = 345,287.28 : x
  2. Step 2: Convert to fraction form
    631,767.28/871,836.72 = 345,287.28/x
  3. Step 3: Cross multiply
    631,767.28x = 871,836.72 × 345,287.28
  4. Step 4: Simplify right side
    631,767.28x = 301,034,129,652.92
  5. Step 5: Solve for x
    x = 301,034,129,652.92/631,767.28
  6. Step 6: Final answer
    x = 476,495.28

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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.