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Finding the Fourth Proportional to 421,017.46, 581,004.72 and 239,729.54

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Solution

The fourth proportional to 421,017.46, 581,004.72 and 239,729.54 is: 330,827.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,017.46 : 581,004.72 = 239,729.54 : x
  2. Step 2: Convert to fraction form
    421,017.46/581,004.72 = 239,729.54/x
  3. Step 3: Cross multiply
    421,017.46x = 581,004.72 × 239,729.54
  4. Step 4: Simplify right side
    421,017.46x = 139,283,991,358.41
  5. Step 5: Solve for x
    x = 139,283,991,358.41/421,017.46
  6. Step 6: Final answer
    x = 330,827.12

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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.