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Finding the Fourth Proportional to 631,374.52, 871,239.64 and 355,777.24

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Solution

The fourth proportional to 631,374.52, 871,239.64 and 355,777.24 is: 490,940.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,374.52 : 871,239.64 = 355,777.24 : x
  2. Step 2: Convert to fraction form
    631,374.52/871,239.64 = 355,777.24/x
  3. Step 3: Cross multiply
    631,374.52x = 871,239.64 × 355,777.24
  4. Step 4: Simplify right side
    631,374.52x = 309,967,234,497.79
  5. Step 5: Solve for x
    x = 309,967,234,497.79/631,374.52
  6. Step 6: Final answer
    x = 490,940.36

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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.