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Finding the Fourth Proportional to 390,648.44, 586,031.16 and 141,388.76

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Solution

The fourth proportional to 390,648.44, 586,031.16 and 141,388.76 is: 212,104.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,648.44 : 586,031.16 = 141,388.76 : x
  2. Step 2: Convert to fraction form
    390,648.44/586,031.16 = 141,388.76/x
  3. Step 3: Cross multiply
    390,648.44x = 586,031.16 × 141,388.76
  4. Step 4: Simplify right side
    390,648.44x = 82,858,219,033.76
  5. Step 5: Solve for x
    x = 82,858,219,033.76/390,648.44
  6. Step 6: Final answer
    x = 212,104.31

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