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Finding the Fourth Proportional to 458,060.80, 687,235.20 and 221,411.20

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Solution

The fourth proportional to 458,060.80, 687,235.20 and 221,411.20 is: 332,186.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,060.80 : 687,235.20 = 221,411.20 : x
  2. Step 2: Convert to fraction form
    458,060.80/687,235.20 = 221,411.20/x
  3. Step 3: Cross multiply
    458,060.80x = 687,235.20 × 221,411.20
  4. Step 4: Simplify right side
    458,060.80x = 152,161,570,314.24
  5. Step 5: Solve for x
    x = 152,161,570,314.24/458,060.80
  6. Step 6: Final answer
    x = 332,186.40

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