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Finding the Fourth Proportional to 522.07, 720.43 and 285.98

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Solution

The fourth proportional to 522.07, 720.43 and 285.98 is: 394.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.07 : 720.43 = 285.98 : x
  2. Step 2: Convert to fraction form
    522.07/720.43 = 285.98/x
  3. Step 3: Cross multiply
    522.07x = 720.43 × 285.98
  4. Step 4: Simplify right side
    522.07x = 206,029.51
  5. Step 5: Solve for x
    x = 206,029.51/522.07
  6. Step 6: Final answer
    x = 394.64

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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.