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Finding the Fourth Proportional to 631,820.36, 871,909.98 and 345,340.28

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Solution

The fourth proportional to 631,820.36, 871,909.98 and 345,340.28 is: 476,568.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,820.36 : 871,909.98 = 345,340.28 : x
  2. Step 2: Convert to fraction form
    631,820.36/871,909.98 = 345,340.28/x
  3. Step 3: Cross multiply
    631,820.36x = 871,909.98 × 345,340.28
  4. Step 4: Simplify right side
    631,820.36x = 301,105,636,627.99
  5. Step 5: Solve for x
    x = 301,105,636,627.99/631,820.36
  6. Step 6: Final answer
    x = 476,568.43

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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.