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Finding the Fourth Proportional to 319,380.07, 478,931.03 and 91,625.44

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Solution

The fourth proportional to 319,380.07, 478,931.03 and 91,625.44 is: 137,398.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,380.07 : 478,931.03 = 91,625.44 : x
  2. Step 2: Convert to fraction form
    319,380.07/478,931.03 = 91,625.44/x
  3. Step 3: Cross multiply
    319,380.07x = 478,931.03 × 91,625.44
  4. Step 4: Simplify right side
    319,380.07x = 43,882,264,592.55
  5. Step 5: Solve for x
    x = 43,882,264,592.55/319,380.07
  6. Step 6: Final answer
    x = 137,398.25

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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.