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Finding the Fourth Proportional to 550,374.81, 758,814.18 and 356,439.85

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Solution

The fourth proportional to 550,374.81, 758,814.18 and 356,439.85 is: 491,431.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,374.81 : 758,814.18 = 356,439.85 : x
  2. Step 2: Convert to fraction form
    550,374.81/758,814.18 = 356,439.85/x
  3. Step 3: Cross multiply
    550,374.81x = 758,814.18 × 356,439.85
  4. Step 4: Simplify right side
    550,374.81x = 270,471,612,497.07
  5. Step 5: Solve for x
    x = 270,471,612,497.07/550,374.81
  6. Step 6: Final answer
    x = 491,431.67

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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.