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Finding the Fourth Proportional to 389,460.60, 584,147.70 and 319,217.40

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Solution

The fourth proportional to 389,460.60, 584,147.70 and 319,217.40 is: 478,790.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,460.60 : 584,147.70 = 319,217.40 : x
  2. Step 2: Convert to fraction form
    389,460.60/584,147.70 = 319,217.40/x
  3. Step 3: Cross multiply
    389,460.60x = 584,147.70 × 319,217.40
  4. Step 4: Simplify right side
    389,460.60x = 186,470,110,009.98
  5. Step 5: Solve for x
    x = 186,470,110,009.98/389,460.60
  6. Step 6: Final answer
    x = 478,790.69

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