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Finding the Fourth Proportional to 389,657.60, 584,443.20 and 319,414.40

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Solution

The fourth proportional to 389,657.60, 584,443.20 and 319,414.40 is: 479,086.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,657.60 : 584,443.20 = 319,414.40 : x
  2. Step 2: Convert to fraction form
    389,657.60/584,443.20 = 319,414.40/x
  3. Step 3: Cross multiply
    389,657.60x = 584,443.20 × 319,414.40
  4. Step 4: Simplify right side
    389,657.60x = 186,679,574,062.08
  5. Step 5: Solve for x
    x = 186,679,574,062.08/389,657.60
  6. Step 6: Final answer
    x = 479,086.19

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