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Finding the Fourth Proportional to 280,345.91, 386,876.16 and 153,021.20

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Solution

The fourth proportional to 280,345.91, 386,876.16 and 153,021.20 is: 211,168.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,345.91 : 386,876.16 = 153,021.20 : x
  2. Step 2: Convert to fraction form
    280,345.91/386,876.16 = 153,021.20/x
  3. Step 3: Cross multiply
    280,345.91x = 386,876.16 × 153,021.20
  4. Step 4: Simplify right side
    280,345.91x = 59,200,252,320.21
  5. Step 5: Solve for x
    x = 59,200,252,320.21/280,345.91
  6. Step 6: Final answer
    x = 211,168.60

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