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Finding the Fourth Proportional to 631,835.62, 871,933.59 and 345,355.70

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Solution

The fourth proportional to 631,835.62, 871,933.59 and 345,355.70 is: 476,591.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,835.62 : 871,933.59 = 345,355.70 : x
  2. Step 2: Convert to fraction form
    631,835.62/871,933.59 = 345,355.70/x
  3. Step 3: Cross multiply
    631,835.62x = 871,933.59 × 345,355.70
  4. Step 4: Simplify right side
    631,835.62x = 301,127,230,968.30
  5. Step 5: Solve for x
    x = 301,127,230,968.30/631,835.62
  6. Step 6: Final answer
    x = 476,591.10

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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.