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Finding the Fourth Proportional to 319,316.52, 478,989.36 and 108,956.28

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Solution

The fourth proportional to 319,316.52, 478,989.36 and 108,956.28 is: 163,439.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,316.52 : 478,989.36 = 108,956.28 : x
  2. Step 2: Convert to fraction form
    319,316.52/478,989.36 = 108,956.28/x
  3. Step 3: Cross multiply
    319,316.52x = 478,989.36 × 108,956.28
  4. Step 4: Simplify right side
    319,316.52x = 52,188,898,825.18
  5. Step 5: Solve for x
    x = 52,188,898,825.18/319,316.52
  6. Step 6: Final answer
    x = 163,439.39

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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.