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Finding the Fourth Proportional to 319,129.60, 478,694.40 and 194,713.60

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Solution

The fourth proportional to 319,129.60, 478,694.40 and 194,713.60 is: 292,070.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,129.60 : 478,694.40 = 194,713.60 : x
  2. Step 2: Convert to fraction form
    319,129.60/478,694.40 = 194,713.60/x
  3. Step 3: Cross multiply
    319,129.60x = 478,694.40 × 194,713.60
  4. Step 4: Simplify right side
    319,129.60x = 93,208,309,923.84
  5. Step 5: Solve for x
    x = 93,208,309,923.84/319,129.60
  6. Step 6: Final answer
    x = 292,070.40

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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.