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Finding the Fourth Proportional to 522.42, 783.87 and 386.61

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Solution

The fourth proportional to 522.42, 783.87 and 386.61 is: 580.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.42 : 783.87 = 386.61 : x
  2. Step 2: Convert to fraction form
    522.42/783.87 = 386.61/x
  3. Step 3: Cross multiply
    522.42x = 783.87 × 386.61
  4. Step 4: Simplify right side
    522.42x = 303,051.98
  5. Step 5: Solve for x
    x = 303,051.98/522.42
  6. Step 6: Final answer
    x = 580.09

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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.