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Finding the Fourth Proportional to 631,614.84, 871,626.30 and 345,137.40

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Solution

The fourth proportional to 631,614.84, 871,626.30 and 345,137.40 is: 476,288.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,614.84 : 871,626.30 = 345,137.40 : x
  2. Step 2: Convert to fraction form
    631,614.84/871,626.30 = 345,137.40/x
  3. Step 3: Cross multiply
    631,614.84x = 871,626.30 × 345,137.40
  4. Step 4: Simplify right side
    631,614.84x = 300,830,834,953.62
  5. Step 5: Solve for x
    x = 300,830,834,953.62/631,614.84
  6. Step 6: Final answer
    x = 476,288.42

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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.