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Finding the Fourth Proportional to 523.60, 784.68 and 215.08

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Solution

The fourth proportional to 523.60, 784.68 and 215.08 is: 322.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.60 : 784.68 = 215.08 : x
  2. Step 2: Convert to fraction form
    523.60/784.68 = 215.08/x
  3. Step 3: Cross multiply
    523.60x = 784.68 × 215.08
  4. Step 4: Simplify right side
    523.60x = 168,768.97
  5. Step 5: Solve for x
    x = 168,768.97/523.60
  6. Step 6: Final answer
    x = 322.32

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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.