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Finding the Fourth Proportional to 523.90, 785.58 and 215.69

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Solution

The fourth proportional to 523.90, 785.58 and 215.69 is: 323.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.90 : 785.58 = 215.69 : x
  2. Step 2: Convert to fraction form
    523.90/785.58 = 215.69/x
  3. Step 3: Cross multiply
    523.90x = 785.58 × 215.69
  4. Step 4: Simplify right side
    523.90x = 169,442.91
  5. Step 5: Solve for x
    x = 169,442.91/523.90
  6. Step 6: Final answer
    x = 323.43

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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.