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Finding the Fourth Proportional to 319,195.71, 478,793.88 and 79,309.35

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Solution

The fourth proportional to 319,195.71, 478,793.88 and 79,309.35 is: 118,964.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,195.71 : 478,793.88 = 79,309.35 : x
  2. Step 2: Convert to fraction form
    319,195.71/478,793.88 = 79,309.35/x
  3. Step 3: Cross multiply
    319,195.71x = 478,793.88 × 79,309.35
  4. Step 4: Simplify right side
    319,195.71x = 37,972,831,406.78
  5. Step 5: Solve for x
    x = 37,972,831,406.78/319,195.71
  6. Step 6: Final answer
    x = 118,964.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.