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Finding the Fourth Proportional to 421,281.46, 581,372.28 and 239,990.70

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Solution

The fourth proportional to 421,281.46, 581,372.28 and 239,990.70 is: 331,189.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,281.46 : 581,372.28 = 239,990.70 : x
  2. Step 2: Convert to fraction form
    421,281.46/581,372.28 = 239,990.70/x
  3. Step 3: Cross multiply
    421,281.46x = 581,372.28 × 239,990.70
  4. Step 4: Simplify right side
    421,281.46x = 139,523,939,237.84
  5. Step 5: Solve for x
    x = 139,523,939,237.84/421,281.46
  6. Step 6: Final answer
    x = 331,189.37

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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.