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Finding the Fourth Proportional to 523.79, 785.69 and 279.58

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Solution

The fourth proportional to 523.79, 785.69 and 279.58 is: 419.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.79 : 785.69 = 279.58 : x
  2. Step 2: Convert to fraction form
    523.79/785.69 = 279.58/x
  3. Step 3: Cross multiply
    523.79x = 785.69 × 279.58
  4. Step 4: Simplify right side
    523.79x = 219,657.88
  5. Step 5: Solve for x
    x = 219,657.88/523.79
  6. Step 6: Final answer
    x = 419.36

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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.