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Finding the Fourth Proportional to 402,970.80, 604,456.20 and 284,872.80

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Solution

The fourth proportional to 402,970.80, 604,456.20 and 284,872.80 is: 427,309.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,970.80 : 604,456.20 = 284,872.80 : x
  2. Step 2: Convert to fraction form
    402,970.80/604,456.20 = 284,872.80/x
  3. Step 3: Cross multiply
    402,970.80x = 604,456.20 × 284,872.80
  4. Step 4: Simplify right side
    402,970.80x = 172,193,130,171.36
  5. Step 5: Solve for x
    x = 172,193,130,171.36/402,970.80
  6. Step 6: Final answer
    x = 427,309.20

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