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Finding the Fourth Proportional to 512,809.60, 707,666.88 and 311,670.40

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Solution

The fourth proportional to 512,809.60, 707,666.88 and 311,670.40 is: 430,098.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,809.60 : 707,666.88 = 311,670.40 : x
  2. Step 2: Convert to fraction form
    512,809.60/707,666.88 = 311,670.40/x
  3. Step 3: Cross multiply
    512,809.60x = 707,666.88 × 311,670.40
  4. Step 4: Simplify right side
    512,809.60x = 220,558,819,556.35
  5. Step 5: Solve for x
    x = 220,558,819,556.35/512,809.60
  6. Step 6: Final answer
    x = 430,098.85

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