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Finding the Fourth Proportional to 421,004.90, 580,958.88 and 239,735.36

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Solution

The fourth proportional to 421,004.90, 580,958.88 and 239,735.36 is: 330,818.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,004.90 : 580,958.88 = 239,735.36 : x
  2. Step 2: Convert to fraction form
    421,004.90/580,958.88 = 239,735.36/x
  3. Step 3: Cross multiply
    421,004.90x = 580,958.88 × 239,735.36
  4. Step 4: Simplify right side
    421,004.90x = 139,276,386,242.00
  5. Step 5: Solve for x
    x = 139,276,386,242.00/421,004.90
  6. Step 6: Final answer
    x = 330,818.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.