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Finding the Fourth Proportional to 405,065.81, 558,990.82 and 235,310.87

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Solution

The fourth proportional to 405,065.81, 558,990.82 and 235,310.87 is: 324,729.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,065.81 : 558,990.82 = 235,310.87 : x
  2. Step 2: Convert to fraction form
    405,065.81/558,990.82 = 235,310.87/x
  3. Step 3: Cross multiply
    405,065.81x = 558,990.82 × 235,310.87
  4. Step 4: Simplify right side
    405,065.81x = 131,536,617,867.83
  5. Step 5: Solve for x
    x = 131,536,617,867.83/405,065.81
  6. Step 6: Final answer
    x = 324,729.00

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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.