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Finding the Fourth Proportional to 631,624.60, 871,631.38 and 345,138.08

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Solution

The fourth proportional to 631,624.60, 871,631.38 and 345,138.08 is: 476,284.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,624.60 : 871,631.38 = 345,138.08 : x
  2. Step 2: Convert to fraction form
    631,624.60/871,631.38 = 345,138.08/x
  3. Step 3: Cross multiply
    631,624.60x = 871,631.38 × 345,138.08
  4. Step 4: Simplify right side
    631,624.60x = 300,833,180,960.95
  5. Step 5: Solve for x
    x = 300,833,180,960.95/631,624.60
  6. Step 6: Final answer
    x = 476,284.78

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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.