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Finding the Fourth Proportional to 319,317.52, 478,990.86 and 108,957.28

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Solution

The fourth proportional to 319,317.52, 478,990.86 and 108,957.28 is: 163,440.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,317.52 : 478,990.86 = 108,957.28 : x
  2. Step 2: Convert to fraction form
    319,317.52/478,990.86 = 108,957.28/x
  3. Step 3: Cross multiply
    319,317.52x = 478,990.86 × 108,957.28
  4. Step 4: Simplify right side
    319,317.52x = 52,189,541,250.46
  5. Step 5: Solve for x
    x = 52,189,541,250.46/319,317.52
  6. Step 6: Final answer
    x = 163,440.89

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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.