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Finding the Fourth Proportional to 631,616.40, 871,680.29 and 359,695.76

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Solution

The fourth proportional to 631,616.40, 871,680.29 and 359,695.76 is: 496,408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,616.40 : 871,680.29 = 359,695.76 : x
  2. Step 2: Convert to fraction form
    631,616.40/871,680.29 = 359,695.76/x
  3. Step 3: Cross multiply
    631,616.40x = 871,680.29 × 359,695.76
  4. Step 4: Simplify right side
    631,616.40x = 313,539,698,231.69
  5. Step 5: Solve for x
    x = 313,539,698,231.69/631,616.40
  6. Step 6: Final answer
    x = 496,408.42

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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.