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Finding the Fourth Proportional to 573.63, 860.55 and 438.36

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Solution

The fourth proportional to 573.63, 860.55 and 438.36 is: 657.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.63 : 860.55 = 438.36 : x
  2. Step 2: Convert to fraction form
    573.63/860.55 = 438.36/x
  3. Step 3: Cross multiply
    573.63x = 860.55 × 438.36
  4. Step 4: Simplify right side
    573.63x = 377,230.70
  5. Step 5: Solve for x
    x = 377,230.70/573.63
  6. Step 6: Final answer
    x = 657.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.