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Finding the Fourth Proportional to 420,804.40, 580,710.72 and 239,516.33

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Solution

The fourth proportional to 420,804.40, 580,710.72 and 239,516.33 is: 330,532.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,804.40 : 580,710.72 = 239,516.33 : x
  2. Step 2: Convert to fraction form
    420,804.40/580,710.72 = 239,516.33/x
  3. Step 3: Cross multiply
    420,804.40x = 580,710.72 × 239,516.33
  4. Step 4: Simplify right side
    420,804.40x = 139,089,700,446.06
  5. Step 5: Solve for x
    x = 139,089,700,446.06/420,804.40
  6. Step 6: Final answer
    x = 330,532.90

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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.