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Finding the Fourth Proportional to 421,364.58, 581,340.68 and 239,947.89

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Solution

The fourth proportional to 421,364.58, 581,340.68 and 239,947.89 is: 331,046.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,364.58 : 581,340.68 = 239,947.89 : x
  2. Step 2: Convert to fraction form
    421,364.58/581,340.68 = 239,947.89/x
  3. Step 3: Cross multiply
    421,364.58x = 581,340.68 × 239,947.89
  4. Step 4: Simplify right side
    421,364.58x = 139,491,468,337.43
  5. Step 5: Solve for x
    x = 139,491,468,337.43/421,364.58
  6. Step 6: Final answer
    x = 331,046.97

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1.5x scale

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.